121762416520 has 32 divisors (see below), whose sum is σ = 274111565400. Its totient is φ = 48678988288.

The previous prime is 121762416509. The next prime is 121762416521. The reversal of 121762416520 is 25614267121.

It can be written as a sum of positive squares in 4 ways, for example, as 108468787716 + 13293628804 = 329346^2 + 115298^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121762416520.

It is not an unprimeable number, because it can be changed into a prime (121762416521) 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 in 7 ways as a sum of consecutive naturals, for example, 735805 + ... + 885964.

Almost surely, 2^121762416520 is an apocalyptic number.

121762416520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121762416520 is an abundant number, since it is smaller than the sum of its proper divisors (152349148880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121762416520 is a wasteful number, since it uses less digits than its factorization.

121762416520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623657 (or 1623653 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 121762416520 in words is "one hundred twenty-one billion, seven hundred sixty-two million, four hundred sixteen thousand, five hundred twenty".