1021634012 has 12 divisors (see below), whose sum is σ = 2043268080. Its totient is φ = 437843136.

The previous prime is 1021633999. The next prime is 1021634021. The reversal of 1021634012 is 2104361201.

1021634012 is an admirable number.

It is a super-2 number, since 2×1021634012² = 2087472108950432288, which contains 22 as substring.

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, 18243437 + ... + 18243492.

It is an arithmetic number, because the mean of its divisors is an integer number (170272340).

Almost surely, 2^1021634012 is an apocalyptic number.

It is an amenable number.

1021634012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1021634012 is a wasteful number, since it uses less digits than its factorization.

1021634012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36486940 (or 36486938 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1021634012 is about 31963.0100585036. The cubic root of 1021634012 is about 1007.1599500966.

Adding to 1021634012 its reverse (2104361201), we get a palindrome (3125995213).

The spelling of 1021634012 in words is "one billion, twenty-one million, six hundred thirty-four thousand, twelve".