21131322102220 has 24 divisors (see below), whose sum is σ = 48409937907408. Its totient is φ = 7684117128000.

The previous prime is 21131322102181. The next prime is 21131322102227. The reversal of 21131322102220 is 2220122313112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21131322102191 and 21131322102200.

It is not an unprimeable number, because it can be changed into a prime (21131322102227) 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 7 ways as a sum of consecutive naturals, for example, 48025731831 + ... + 48025732270.

It is an arithmetic number, because the mean of its divisors is an integer number (2017080746142).

Almost surely, 2^{21131322102220} is an apocalyptic number.

21131322102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21131322102220 is an abundant number, since it is smaller than the sum of its proper divisors (27278615805188).

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

21131322102220 is a wasteful number, since it uses less digits than its factorization.

21131322102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96051464121 (or 96051464119 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21131322102220 its reverse (2220122313112), we get a palindrome (23351444415332).

The spelling of 21131322102220 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred twenty-two million, one hundred two thousand, two hundred twenty".