100020311020 has 48 divisors (see below), whose sum is σ = 241521493248. Its totient is φ = 34082285760.

The previous prime is 100020310997. The next prime is 100020311023. The reversal of 100020311020 is 20113020001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 100020310988 and 100020311006.

It is not an unprimeable number, because it can be changed into a prime (100020311023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2168686 + ... + 2214325.

It is an arithmetic number, because the mean of its divisors is an integer number (5031697776).

Almost surely, 2^100020311020 is an apocalyptic number.

100020311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020311020 is an abundant number, since it is smaller than the sum of its proper divisors (141501182228).

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

100020311020 is a wasteful number, since it uses less digits than its factorization.

100020311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4383190 (or 4383188 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 100020311020 its reverse (20113020001), we get a palindrome (120133331021).

The spelling of 100020311020 in words is "one hundred billion, twenty million, three hundred eleven thousand, twenty".