1021021980 has 96 divisors (see below), whose sum is σ = 3254404608. Its totient is φ = 236755200.

The previous prime is 1021021979. The next prime is 1021021997. The reversal of 1021021980 is 891201201.

1021021980 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1021021980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18451 + ... + 48810.

It is an arithmetic number, because the mean of its divisors is an integer number (33900048).

Almost surely, 2^1021021980 is an apocalyptic number.

1021021980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021021980 is an abundant number, since it is smaller than the sum of its proper divisors (2233382628).

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

1021021980 is a wasteful number, since it uses less digits than its factorization.

1021021980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67307 (or 67305 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 1021021980 is about 31953.4345571802. The cubic root of 1021021980 is about 1006.9587895882.

The spelling of 1021021980 in words is "one billion, twenty-one million, twenty-one thousand, nine hundred eighty".