121631265730 has 16 divisors (see below), whose sum is σ = 235777530744. Its totient is φ = 44910005760.

The previous prime is 121631265713. The next prime is 121631265731. The reversal of 121631265730 is 37562136121.

It can be written as a sum of positive squares in 4 ways, for example, as 104650309009 + 16980956721 = 323497^2 + 130311^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121631265730.

It is not an unprimeable number, because it can be changed into a prime (121631265731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467812431 + ... + 467812690.

Almost surely, 2^121631265730 is an apocalyptic number.

121631265730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121631265730 is a deficient number, since it is larger than the sum of its proper divisors (114146265014).

121631265730 is a wasteful number, since it uses less digits than its factorization.

121631265730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935625141.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 121631265730 in words is "one hundred twenty-one billion, six hundred thirty-one million, two hundred sixty-five thousand, seven hundred thirty".