1021312012 has 24 divisors (see below), whose sum is σ = 2067238656. Its totient is φ = 432430608.

The previous prime is 1021311983. The next prime is 1021312027. The reversal of 1021312012 is 2102131201.

It is a junction number, because it is equal to n+sod(n) for n = 1021311983 and 1021312001.

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 7 ways as a sum of consecutive naturals, for example, 217408 + ... + 222055.

It is an arithmetic number, because the mean of its divisors is an integer number (86134944).

Almost surely, 2^1021312012 is an apocalyptic number.

It is an amenable number.

1021312012 is an abundant number, since it is smaller than the sum of its proper divisors (1045926644).

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

1021312012 is a wasteful number, since it uses less digits than its factorization.

1021312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439557 (or 439555 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1021312012 is about 31957.9725890113. The cubic root of 1021312012 is about 1007.0541262961.

Adding to 1021312012 its reverse (2102131201), we get a palindrome (3123443213).

It can be divided in two parts, 102131201 and 2, that multiplied together give a palindrome (204262402).

The spelling of 1021312012 in words is "one billion, twenty-one million, three hundred twelve thousand, twelve".