21223100113020 has 144 divisors (see below), whose sum is σ = 71719441990560. Its totient is φ = 5044004679168.

The previous prime is 21223100112971. The next prime is 21223100113021. The reversal of 21223100113020 is 2031100132212.

21223100113020 is a `hidden beast` number, since 21 + 22 + 310 + 0 + 11 + 302 + 0 = 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 = 21223100112984 and 21223100113002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223100113021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156306294 + ... + 156442013.

It is an arithmetic number, because the mean of its divisors is an integer number (498051680490).

Almost surely, 2^{21223100113020} is an apocalyptic number.

21223100113020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223100113020 is an abundant number, since it is smaller than the sum of its proper divisors (50496341877540).

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

21223100113020 is a wasteful number, since it uses less digits than its factorization.

21223100113020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312748364 (or 312748359 counting only the distinct ones).

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

Adding to 21223100113020 its reverse (2031100132212), we get a palindrome (23254200245232).

The spelling of 21223100113020 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred million, one hundred thirteen thousand, twenty".