21310203210120 has 160 divisors (see below), whose sum is σ = 78137411901120. Its totient is φ = 5166109860480.

The previous prime is 21310203210089. The next prime is 21310203210139. The reversal of 21310203210120 is 2101230201312.

21310203210120 is a `hidden beast` number, since 2 + 1 + 310 + 20 + 3 + 210 + 120 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21310203210093 and 21310203210102.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 298929052 + ... + 299000331.

It is an arithmetic number, because the mean of its divisors is an integer number (488358824382).

Almost surely, 2^{21310203210120} is an apocalyptic number.

21310203210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310203210120 is an abundant number, since it is smaller than the sum of its proper divisors (56827208691000).

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

21310203210120 is a wasteful number, since it uses less digits than its factorization.

21310203210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597929417 (or 597929404 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21310203210120 its reverse (2101230201312), we get a palindrome (23411433411432).

The spelling of 21310203210120 in words is "twenty-one trillion, three hundred ten billion, two hundred three million, two hundred ten thousand, one hundred twenty".