12121021111012 has 72 divisors (see below), whose sum is σ = 23827757385600. Its totient is φ = 5350313142720.

The previous prime is 12121021110973. The next prime is 12121021111057. The reversal of 12121021111012 is 21011112012121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13643989 + ... + 14505187.

It is an arithmetic number, because the mean of its divisors is an integer number (330941074800).

Almost surely, 2^{12121021111012} is an apocalyptic number.

It is an amenable number.

12121021111012 is a deficient number, since it is larger than the sum of its proper divisors (11706736274588).

12121021111012 is a wasteful number, since it uses less digits than its factorization.

12121021111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861473 (or 861428 counting only the distinct ones).

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

Adding to 12121021111012 its reverse (21011112012121), we get a palindrome (33132133123133).

The spelling of 12121021111012 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, one hundred eleven thousand, twelve".