102921021020 has 12 divisors (see below), whose sum is σ = 216134144184. Its totient is φ = 41168408400.

The previous prime is 102921020989. The next prime is 102921021037. The reversal of 102921021020 is 20120129201.

It is a happy number.

102921021020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5146051051 = 102921021020 / (1 + 0 + 2 + 9 + 2 + 1 + 0 + 2 + 1 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 102921020983 and 102921021001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2573025506 + ... + 2573025545.

It is an arithmetic number, because the mean of its divisors is an integer number (18011178682).

Almost surely, 2^102921021020 is an apocalyptic number.

102921021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102921021020 is an abundant number, since it is smaller than the sum of its proper divisors (113213123164).

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

102921021020 is a wasteful number, since it uses less digits than its factorization.

102921021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146051060 (or 5146051058 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 102921021020 in words is "one hundred two billion, nine hundred twenty-one million, twenty-one thousand, twenty".