1212101112 has 16 divisors (see below), whose sum is σ = 3030252840. Its totient is φ = 404033696.

The previous prime is 1212101053. The next prime is 1212101119. The reversal of 1212101112 is 2111012121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212101119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25252083 + ... + 25252130.

Almost surely, 2^1212101112 is an apocalyptic number.

1212101112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212101112 is an abundant number, since it is smaller than the sum of its proper divisors (1818151728).

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

1212101112 is a wasteful number, since it uses less digits than its factorization.

1212101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50504222 (or 50504218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1212101112 is about 34815.2425239291. The cubic root of 1212101112 is about 1066.2186706370.

Adding to 1212101112 its reverse (2111012121), we get a palindrome (3323113233).

The spelling of 1212101112 in words is "one billion, two hundred twelve million, one hundred one thousand, one hundred twelve".