121012212112 has 20 divisors (see below), whose sum is σ = 255775812336. Its totient is φ = 55005550880.

The previous prime is 121012212107. The next prime is 121012212119. The reversal of 121012212112 is 211212210121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (121012212119) 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 3 ways as a sum of consecutive naturals, for example, 343784518 + ... + 343784869.

Almost surely, 2^121012212112 is an apocalyptic number.

It is an amenable number.

121012212112 is an abundant number, since it is smaller than the sum of its proper divisors (134763600224).

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

121012212112 is a wasteful number, since it uses less digits than its factorization.

121012212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687569406 (or 687569400 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121012212112 its reverse (211212210121), we get a palindrome (332224422233).

The spelling of 121012212112 in words is "one hundred twenty-one billion, twelve million, two hundred twelve thousand, one hundred twelve".