2012121111 has 32 divisors (see below), whose sum is σ = 3602124288. Its totient is φ = 964851840.

The previous prime is 2012121107. The next prime is 2012121113. The reversal of 2012121111 is 1111212102.

It is not a de Polignac number, because 2012121111 - 2² = 2012121107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012121113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 332016 + ... + 338021.

It is an arithmetic number, because the mean of its divisors is an integer number (112566384).

Almost surely, 2^2012121111 is an apocalyptic number.

2012121111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2012121111 is a deficient number, since it is larger than the sum of its proper divisors (1590003177).

2012121111 is a wasteful number, since it uses less digits than its factorization.

2012121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670071.

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

The square root of 2012121111 is about 44856.6729818430. The cubic root of 2012121111 is about 1262.4611990297.

Adding to 2012121111 its reverse (1111212102), we get a palindrome (3123333213).

Subtracting from 2012121111 its reverse (1111212102), we obtain a palindrome (900909009).

The spelling of 2012121111 in words is "two billion, twelve million, one hundred twenty-one thousand, one hundred eleven".