1212021111112 has 32 divisors (see below), whose sum is σ = 2597252296320. Its totient is φ = 519424778880.

The previous prime is 1212021111101. The next prime is 1212021111113. The reversal of 1212021111112 is 2111111202121.

It is not an unprimeable number, because it can be changed into a prime (1212021111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2223412 + ... + 2714332.

It is an arithmetic number, because the mean of its divisors is an integer number (81164134260).

Almost surely, 2^{1212021111112} is an apocalyptic number.

It is an amenable number.

1212021111112 is an abundant number, since it is smaller than the sum of its proper divisors (1385231185208).

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

1212021111112 is a wasteful number, since it uses less digits than its factorization.

1212021111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535021 (or 535017 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1212021111112 its reverse (2111111202121), we get a palindrome (3323132313233).

The spelling of 1212021111112 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred eleven thousand, one hundred twelve".