21023100322220 has 24 divisors (see below), whose sum is σ = 44331699527808. Its totient is φ = 8374347014400.

The previous prime is 21023100322207. The next prime is 21023100322271. The reversal of 21023100322220 is 2222300132012.

It is a happy number.

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 = 21023100322192 and 21023100322201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2180814716 + ... + 2180824355.

It is an arithmetic number, because the mean of its divisors is an integer number (1847154146992).

Almost surely, 2^{21023100322220} is an apocalyptic number.

21023100322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023100322220 is an abundant number, since it is smaller than the sum of its proper divisors (23308599205588).

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

21023100322220 is a wasteful number, since it uses less digits than its factorization.

21023100322220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361639321 (or 4361639319 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21023100322220 its reverse (2222300132012), we get a palindrome (23245400454232).

The spelling of 21023100322220 in words is "twenty-one trillion, twenty-three billion, one hundred million, three hundred twenty-two thousand, two hundred twenty".