1011099972 has 48 divisors (see below), whose sum is σ = 2487531200. Its totient is φ = 318764160.

The previous prime is 1011099961. The next prime is 1011099989. The reversal of 1011099972 is 2799901101.

It is a self number, because there is not a number n which added to its sum of digits gives 1011099972.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147354 + ... + 154062.

Almost surely, 2^1011099972 is an apocalyptic number.

1011099972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1011099972 is an abundant number, since it is smaller than the sum of its proper divisors (1476431228).

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

1011099972 is a wasteful number, since it uses less digits than its factorization.

1011099972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7396 (or 7394 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 39.

The square root of 1011099972 is about 31797.7982256634. The cubic root of 1011099972 is about 1003.6863845371.

The spelling of 1011099972 in words is "one billion, eleven million, ninety-nine thousand, nine hundred seventy-two".