1021211982 has 64 divisors (see below), whose sum is σ = 2677248000. Its totient is φ = 282359520.

The previous prime is 1021211977. The next prime is 1021212007. The reversal of 1021211982 is 2891121201.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31857 + ... + 55292.

It is an arithmetic number, because the mean of its divisors is an integer number (41832000).

Almost surely, 2^1021211982 is an apocalyptic number.

1021211982 is an abundant number, since it is smaller than the sum of its proper divisors (1656036018).

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

1021211982 is a wasteful number, since it uses less digits than its factorization.

1021211982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87198 (or 87192 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1021211982 is about 31956.4075265040. The cubic root of 1021211982 is about 1007.0212473744.

The spelling of 1021211982 in words is "one billion, twenty-one million, two hundred eleven thousand, nine hundred eighty-two".