21230002231020 has 72 divisors (see below), whose sum is σ = 70252007389200. Its totient is φ = 5146667207040.

The previous prime is 21230002230961. The next prime is 21230002231069. The reversal of 21230002231020 is 2013220003212.

21230002231020 is a `hidden beast` number, since 2 + 12 + 300 + 0 + 22 + 310 + 20 = 666.

It is a super-2 number, since 2×21230002231020² (a number of 27 digits) contains 22 as substring.

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 = 21230002230984 and 21230002231002.

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, 5361109695 + ... + 5361113654.

It is an arithmetic number, because the mean of its divisors is an integer number (975722324850).

Almost surely, 2^{21230002231020} is an apocalyptic number.

21230002231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230002231020 is an abundant number, since it is smaller than the sum of its proper divisors (49022005158180).

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

21230002231020 is a wasteful number, since it uses less digits than its factorization.

21230002231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722223375 (or 10722223370 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21230002231020 its reverse (2013220003212), we get a palindrome (23243222234232).

The spelling of 21230002231020 in words is "twenty-one trillion, two hundred thirty billion, two million, two hundred thirty-one thousand, twenty".