121751560631 has 2 divisors, whose sum is σ = 121751560632. Its totient is φ = 121751560630.

The previous prime is 121751560583. The next prime is 121751560657. The reversal of 121751560631 is 136065157121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121751560631 - 2²⁶ = 121684451767 is a prime.

It is a super-2 number, since 2×121751560631² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121751160631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60875780315 + 60875780316.

It is an arithmetic number, because the mean of its divisors is an integer number (60875780316).

Almost surely, 2^121751560631 is an apocalyptic number.

121751560631 is a deficient number, since it is larger than the sum of its proper divisors (1).

121751560631 is an equidigital number, since it uses as much as digits as its factorization.

121751560631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 121751560631 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred sixty thousand, six hundred thirty-one".