1121913631 has 2 divisors, whose sum is σ = 1121913632. Its totient is φ = 1121913630.

The previous prime is 1121913599. The next prime is 1121913649. The reversal of 1121913631 is 1363191211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121913631 - 2⁵ = 1121913599 is a prime.

It is a super-2 number, since 2×1121913631² = 2517380390847208322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121913631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121913431) 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, 560956815 + 560956816.

It is an arithmetic number, because the mean of its divisors is an integer number (560956816).

Almost surely, 2^1121913631 is an apocalyptic number.

1121913631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121913631 is an equidigital number, since it uses as much as digits as its factorization.

1121913631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 28.

The square root of 1121913631 is about 33494.9791909176. The cubic root of 1121913631 is about 1039.0899432197.

The spelling of 1121913631 in words is "one billion, one hundred twenty-one million, nine hundred thirteen thousand, six hundred thirty-one".