1121291931 has 16 divisors (see below), whose sum is σ = 1548207360. Its totient is φ = 721005600.

The previous prime is 1121291921. The next prime is 1121291939. The reversal of 1121291931 is 1391921211.

It is not a de Polignac number, because 1121291931 - 2⁷ = 1121291803 is a prime.

It is a super-2 number, since 2×1121291931² = 2514591189051417522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121291939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85306 + ... + 97568.

It is an arithmetic number, because the mean of its divisors is an integer number (96762960).

Almost surely, 2^1121291931 is an apocalyptic number.

1121291931 is a deficient number, since it is larger than the sum of its proper divisors (426915429).

1121291931 is a wasteful number, since it uses less digits than its factorization.

1121291931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346.

The product of its digits is 972, while the sum is 30.

The square root of 1121291931 is about 33485.6974094911. The cubic root of 1121291931 is about 1038.8979731303.

The spelling of 1121291931 in words is "one billion, one hundred twenty-one million, two hundred ninety-one thousand, nine hundred thirty-one".