21031022203120 has 80 divisors (see below), whose sum is σ = 48969780019200. Its totient is φ = 8399918592000.

The previous prime is 21031022203073. The next prime is 21031022203127. The reversal of 21031022203120 is 2130222013012.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031022203127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148757265 + ... + 148898575.

It is an arithmetic number, because the mean of its divisors is an integer number (612122250240).

Almost surely, 2^{21031022203120} is an apocalyptic number.

21031022203120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031022203120 is an abundant number, since it is smaller than the sum of its proper divisors (27938757816080).

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

21031022203120 is a wasteful number, since it uses less digits than its factorization.

21031022203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144074 (or 144068 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21031022203120 its reverse (2130222013012), we get a palindrome (23161244216132).

The spelling of 21031022203120 in words is "twenty-one trillion, thirty-one billion, twenty-two million, two hundred three thousand, one hundred twenty".