1121640631 has 2 divisors, whose sum is σ = 1121640632. Its totient is φ = 1121640630.

The previous prime is 1121640617. The next prime is 1121640673. The reversal of 1121640631 is 1360461211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121640631 - 2¹⁵ = 1121607863 is a prime.

It is a super-3 number, since 3×1121640631³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1121640596 and 1121640605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121640601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560820315 + 560820316.

It is an arithmetic number, because the mean of its divisors is an integer number (560820316).

Almost surely, 2^1121640631 is an apocalyptic number.

1121640631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121640631 is an equidigital number, since it uses as much as digits as its factorization.

1121640631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1121640631 is about 33490.9037053347. The cubic root of 1121640631 is about 1039.0056543289.

The spelling of 1121640631 in words is "one billion, one hundred twenty-one million, six hundred forty thousand, six hundred thirty-one".