111212010 has 192 divisors, whose sum is σ = 366492672. Its totient is φ = 22768128.

The previous prime is 111211999. The next prime is 111212021. The reversal of 111212010 is 10212111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111211999) and next prime (111212021).

It is a super-2 number, since 2×111212010² = 24736222336480200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111211983 and 111212001.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 302847 + ... + 303213.

It is an arithmetic number, because the mean of its divisors is an integer number (1908816).

Almost surely, 2^111212010 is an apocalyptic number.

111212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111212010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183246336).

111212010 is an abundant number, since it is smaller than the sum of its proper divisors (255280662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111212010 is a wasteful number, since it uses less digits than its factorization.

111212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 111212010 is about 10545.7105023796. The cubic root of 111212010 is about 480.8953341217.

Adding to 111212010 its reverse (10212111), we get a palindrome (121424121).

It can be divided in two parts, 11121 and 2010, that added together give a palindrome (13131).

The spelling of 111212010 in words is "one hundred eleven million, two hundred twelve thousand, ten".