1012021983 has 24 divisors (see below), whose sum is σ = 1711391136. Its totient is φ = 564192000.

The previous prime is 1012021973. The next prime is 1012021987. The reversal of 1012021983 is 3891202101.

It is not a de Polignac number, because 1012021983 - 2¹⁸ = 1011759839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012021987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193318 + ... + 198483.

It is an arithmetic number, because the mean of its divisors is an integer number (71307964).

Almost surely, 2^1012021983 is an apocalyptic number.

1012021983 is a deficient number, since it is larger than the sum of its proper divisors (699369153).

1012021983 is a wasteful number, since it uses less digits than its factorization.

1012021983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391855 (or 391852 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1012021983 is about 31812.2929541396. The cubic root of 1012021983 is about 1003.9913753935.

It can be divided in two parts, 101 and 2021983, that added together give a square (2022084 = 1422²).

The spelling of 1012021983 in words is "one billion, twelve million, twenty-one thousand, nine hundred eighty-three".