12121012111012 has 48 divisors (see below), whose sum is σ = 24848194025088. Its totient is φ = 5064977998080.

The previous prime is 12121012111009. The next prime is 12121012111031. The reversal of 12121012111012 is 21011121012121.

It is a super-2 number, since 2×12121012111012² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253163 + ... + 5080594.

It is an arithmetic number, because the mean of its divisors is an integer number (517670708856).

Almost surely, 2^{12121012111012} is an apocalyptic number.

It is an amenable number.

12121012111012 is an abundant number, since it is smaller than the sum of its proper divisors (12727181914076).

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

12121012111012 is a wasteful number, since it uses less digits than its factorization.

12121012111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6335476 (or 6335474 counting only the distinct ones).

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

Adding to 12121012111012 its reverse (21011121012121), we get a palindrome (33132133123133).

The spelling of 12121012111012 in words is "twelve trillion, one hundred twenty-one billion, twelve million, one hundred eleven thousand, twelve".