100013021020 has 48 divisors (see below), whose sum is σ = 229665181536. Its totient is φ = 36281952000.

The previous prime is 100013020979. The next prime is 100013021023. The reversal of 100013021020 is 20120310001.

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 = 100013020988 and 100013021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100013021023) 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, 447291 + ... + 632530.

It is an arithmetic number, because the mean of its divisors is an integer number (4784691282).

Almost surely, 2^100013021020 is an apocalyptic number.

100013021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100013021020 is an abundant number, since it is smaller than the sum of its proper divisors (129652160516).

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

100013021020 is a wasteful number, since it uses less digits than its factorization.

100013021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080262 (or 1080260 counting only the distinct ones).

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

Adding to 100013021020 its reverse (20120310001), we get a palindrome (120133331021).

The spelling of 100013021020 in words is "one hundred billion, thirteen million, twenty-one thousand, twenty".