21201022121120 has 48 divisors (see below), whose sum is σ = 50469761488608. Its totient is φ = 8415672894720.

The previous prime is 21201022121113. The next prime is 21201022121173. The reversal of 21201022121120 is 2112122010212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505728614 + ... + 505770533.

It is an arithmetic number, because the mean of its divisors is an integer number (1051453364346).

Almost surely, 2^{21201022121120} is an apocalyptic number.

21201022121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201022121120 is an abundant number, since it is smaller than the sum of its proper divisors (29268739367488).

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

21201022121120 is a wasteful number, since it uses less digits than its factorization.

21201022121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011499293 (or 1011499285 counting only the distinct ones).

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

Adding to 21201022121120 its reverse (2112122010212), we get a palindrome (23313144131332).

The spelling of 21201022121120 in words is "twenty-one trillion, two hundred one billion, twenty-two million, one hundred twenty-one thousand, one hundred twenty".