1022021512 has 8 divisors (see below), whose sum is σ = 1916290350. Its totient is φ = 511010752.

The previous prime is 1022021501. The next prime is 1022021513. The reversal of 1022021512 is 2151202201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 708943876 + 313077636 = 26626^2 + 17694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1022021512² = 2089055941981532288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1022021513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63876337 + ... + 63876352.

Almost surely, 2^1022021512 is an apocalyptic number.

It is an amenable number.

1022021512 is a deficient number, since it is larger than the sum of its proper divisors (894268838).

1022021512 is a wasteful number, since it uses less digits than its factorization.

1022021512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127752695 (or 127752691 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1022021512 is about 31969.0711782498. The cubic root of 1022021512 is about 1007.2872706907.

Adding to 1022021512 its reverse (2151202201), we get a palindrome (3173223713).

The spelling of 1022021512 in words is "one billion, twenty-two million, twenty-one thousand, five hundred twelve".