2120121221012 has 48 divisors (see below), whose sum is σ = 3735454726080. Its totient is φ = 1052879473152.

The previous prime is 2120121220913. The next prime is 2120121221041. The reversal of 2120121221012 is 2101221210212.

It is a congruent number.

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, 531489914 + ... + 531493902.

It is an arithmetic number, because the mean of its divisors is an integer number (77821973460).

Almost surely, 2^{2120121221012} is an apocalyptic number.

It is an amenable number.

2120121221012 is a deficient number, since it is larger than the sum of its proper divisors (1615333505068).

2120121221012 is a wasteful number, since it uses less digits than its factorization.

2120121221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720 (or 5718 counting only the distinct ones).

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

Adding to 2120121221012 its reverse (2101221210212), we get a palindrome (4221342431224).

The spelling of 2120121221012 in words is "two trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, twelve".