20021113100 has 36 divisors (see below), whose sum is σ = 44182198200. Its totient is φ = 7872706560.

The previous prime is 20021113097. The next prime is 20021113127. The reversal of 20021113100 is 131112002.

It is a super-2 number, since 2×20021113100² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1690805 + ... + 1702604.

Almost surely, 2^20021113100 is an apocalyptic number.

20021113100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021113100 is an abundant number, since it is smaller than the sum of its proper divisors (24161085100).

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

20021113100 is a wasteful number, since it uses less digits than its factorization.

20021113100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393482 (or 3393475 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20021113100 its reverse (131112002), we get a palindrome (20152225102).

The spelling of 20021113100 in words is "twenty billion, twenty-one million, one hundred thirteen thousand, one hundred".