21320231130220 has 24 divisors (see below), whose sum is σ = 48842711317008. Its totient is φ = 7752811320000.

The previous prime is 21320231130199. The next prime is 21320231130221. The reversal of 21320231130220 is 2203113202312.

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 = 21320231130191 and 21320231130200.

It is not an unprimeable number, because it can be changed into a prime (21320231130221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48455070531 + ... + 48455070970.

It is an arithmetic number, because the mean of its divisors is an integer number (2035112971542).

Almost surely, 2^{21320231130220} is an apocalyptic number.

21320231130220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320231130220 is an abundant number, since it is smaller than the sum of its proper divisors (27522480186788).

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

21320231130220 is a wasteful number, since it uses less digits than its factorization.

21320231130220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96910141521 (or 96910141519 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21320231130220 its reverse (2203113202312), we get a palindrome (23523344332532).

The spelling of 21320231130220 in words is "twenty-one trillion, three hundred twenty billion, two hundred thirty-one million, one hundred thirty thousand, two hundred twenty".