100021111983 has 20 divisors (see below), whose sum is σ = 160907659528. Its totient is φ = 61551452880.

The previous prime is 100021111979. The next prime is 100021112003. The reversal of 100021111983 is 389111120001.

It is not a de Polignac number, because 100021111983 - 2² = 100021111979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021111943) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47492353 + ... + 47494458.

Almost surely, 2^100021111983 is an apocalyptic number.

100021111983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100021111983 is a deficient number, since it is larger than the sum of its proper divisors (60886547545).

100021111983 is an equidigital number, since it uses as much as digits as its factorization.

100021111983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94986836 (or 94986827 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

Adding to 100021111983 its reverse (389111120001), we get a palindrome (489132231984).

The spelling of 100021111983 in words is "one hundred billion, twenty-one million, one hundred eleven thousand, nine hundred eighty-three".