20021123003100 has 144 divisors (see below), whose sum is σ = 59617576647552. Its totient is φ = 5184660176640.

The previous prime is 20021123003053. The next prime is 20021123003149. The reversal of 20021123003100 is 130032112002.

It is a super-2 number, since 2×20021123003100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20021123003100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2253922 + ... + 6717321.

Almost surely, 2^{20021123003100} is an apocalyptic number.

20021123003100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021123003100 is an abundant number, since it is smaller than the sum of its proper divisors (39596453644452).

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

20021123003100 is a wasteful number, since it uses less digits than its factorization.

20021123003100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971476 (or 8971469 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20021123003100 its reverse (130032112002), we get a palindrome (20151155115102).

The spelling of 20021123003100 in words is "twenty trillion, twenty-one billion, one hundred twenty-three million, three thousand, one hundred".