21130322013020 has 48 divisors (see below), whose sum is σ = 50512327100928. Its totient is φ = 7349677220160.

The previous prime is 21130322013019. The next prime is 21130322013023. The reversal of 21130322013020 is 2031022303112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21130322012983 and 21130322013001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130322013023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2087971424 + ... + 2087981543.

It is an arithmetic number, because the mean of its divisors is an integer number (1052340147936).

Almost surely, 2^{21130322013020} is an apocalyptic number.

21130322013020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21130322013020 is an abundant number, since it is smaller than the sum of its proper divisors (29382005087908).

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

21130322013020 is a wasteful number, since it uses less digits than its factorization.

21130322013020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175953010 (or 4175953008 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21130322013020 its reverse (2031022303112), we get a palindrome (23161344316132).

The spelling of 21130322013020 in words is "twenty-one trillion, one hundred thirty billion, three hundred twenty-two million, thirteen thousand, twenty".