1122987121 has 27 divisors (see below), whose sum is σ = 1239384153. Its totient is φ = 1017393960.

The previous prime is 1122987091. The next prime is 1122987157. The reversal of 1122987121 is 1217892211.

The square root of 1122987121 is 33511.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1122987121 - 2⁷ = 1122986993 is a prime.

It is a super-2 number, since 2×1122987121² = 2522200147863737282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122982121) 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 in 26 ways as a sum of consecutive naturals, for example, 23893320 + ... + 23893366.

Almost surely, 2^1122987121 is an apocalyptic number.

1122987121 is the 33511-st square number.

1122987121 is the 16756-th centered octagonal number.

It is an amenable number.

1122987121 is a deficient number, since it is larger than the sum of its proper divisors (116397032).

1122987121 is an frugal number, since it uses more digits than its factorization.

1122987121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 101 counting only the distinct ones).

The product of its digits is 4032, while the sum is 34.

The cubic root of 1122987121 is about 1039.4212512788.

The spelling of 1122987121 in words is "one billion, one hundred twenty-two million, nine hundred eighty-seven thousand, one hundred twenty-one".