21210110131320 has 96 divisors (see below), whose sum is σ = 75199481388720. Its totient is φ = 5141844879360.

The previous prime is 21210110131277. The next prime is 21210110131367. The reversal of 21210110131320 is 2313101101212.

21210110131320 is a `hidden beast` number, since 2 + 1 + 210 + 1 + 1 + 0 + 131 + 320 = 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 = 21210110131293 and 21210110131302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2678040249 + ... + 2678048168.

Almost surely, 2^{21210110131320} is an apocalyptic number.

21210110131320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210110131320 is an abundant number, since it is smaller than the sum of its proper divisors (53989371257400).

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

21210110131320 is a wasteful number, since it uses less digits than its factorization.

21210110131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5356088445 (or 5356088438 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21210110131320 its reverse (2313101101212), we get a palindrome (23523211232532).

The spelling of 21210110131320 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, one hundred thirty-one thousand, three hundred twenty".