12121021220012 has 48 divisors (see below), whose sum is σ = 22544186716800. Its totient is φ = 5682515558400.

The previous prime is 12121021219999. The next prime is 12121021220137. The reversal of 12121021220012 is 21002212012121.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 418688114 + ... + 418717062.

It is an arithmetic number, because the mean of its divisors is an integer number (469670556600).

Almost surely, 2^{12121021220012} is an apocalyptic number.

It is an amenable number.

12121021220012 is a deficient number, since it is larger than the sum of its proper divisors (10423165496788).

12121021220012 is a wasteful number, since it uses less digits than its factorization.

12121021220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51962 (or 51960 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121021220012 its reverse (21002212012121), we get a palindrome (33123233232133).

The spelling of 12121021220012 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty thousand, twelve".