21130023002220 has 72 divisors (see below), whose sum is σ = 69921167032080. Its totient is φ = 5122429818240.

The previous prime is 21130023002159. The next prime is 21130023002227. The reversal of 21130023002220 is 2220032003112.

21130023002220 is a `hidden beast` number, since 21 + 1 + 300 + 2 + 300 + 22 + 20 = 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 = 21130023002193 and 21130023002202.

It is not an unprimeable number, because it can be changed into a prime (21130023002227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5335862415 + ... + 5335866374.

It is an arithmetic number, because the mean of its divisors is an integer number (971127319890).

Almost surely, 2^{21130023002220} is an apocalyptic number.

21130023002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21130023002220 is an abundant number, since it is smaller than the sum of its proper divisors (48791144029860).

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

21130023002220 is a wasteful number, since it uses less digits than its factorization.

21130023002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10671728815 (or 10671728810 counting only the distinct ones).

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

Adding to 21130023002220 its reverse (2220032003112), we get a palindrome (23350055005332).

The spelling of 21130023002220 in words is "twenty-one trillion, one hundred thirty billion, twenty-three million, two thousand, two hundred twenty".