2121613631 has 2 divisors, whose sum is σ = 2121613632. Its totient is φ = 2121613630.

The previous prime is 2121613609. The next prime is 2121613643. The reversal of 2121613631 is 1363161212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121613631 - 2¹⁰ = 2121612607 is a prime.

It is a super-2 number, since 2×2121613631² = 9002488798490008322, 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 2121613631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121613601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060806815 + 1060806816.

It is an arithmetic number, because the mean of its divisors is an integer number (1060806816).

Almost surely, 2^2121613631 is an apocalyptic number.

2121613631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121613631 is an equidigital number, since it uses as much as digits as its factorization.

2121613631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 2121613631 is about 46060.9773126884. The cubic root of 2121613631 is about 1284.9575061018.

Adding to 2121613631 its reverse (1363161212), we get a palindrome (3484774843).

The spelling of 2121613631 in words is "two billion, one hundred twenty-one million, six hundred thirteen thousand, six hundred thirty-one".