121740488865 has 16 divisors (see below), whose sum is σ = 216427536000. Its totient is φ = 64928260656.

The previous prime is 121740488843. The next prime is 121740488911. The reversal of 121740488865 is 568884047121.

121740488865 is a `hidden beast` number, since 12 + 1 + 74 + 0 + 488 + 86 + 5 = 666.

It is not a de Polignac number, because 121740488865 - 2¹² = 121740484769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450890565 + ... + 450890834.

It is an arithmetic number, because the mean of its divisors is an integer number (13526721000).

Almost surely, 2^121740488865 is an apocalyptic number.

121740488865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121740488865 is a deficient number, since it is larger than the sum of its proper divisors (94687047135).

121740488865 is an equidigital number, since it uses as much as digits as its factorization.

121740488865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901781413 (or 901781407 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The spelling of 121740488865 in words is "one hundred twenty-one billion, seven hundred forty million, four hundred eighty-eight thousand, eight hundred sixty-five".