121346787880 has 16 divisors (see below), whose sum is σ = 273030272820. Its totient is φ = 48538715136.

The previous prime is 121346787871. The next prime is 121346787901. The reversal of 121346787880 is 88787643121.

It can be written as a sum of positive squares in 2 ways, for example, as 120074724324 + 1272063556 = 346518^2 + 35666^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516834809 + ... + 1516834888.

Almost surely, 2^121346787880 is an apocalyptic number.

121346787880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121346787880 is an abundant number, since it is smaller than the sum of its proper divisors (151683484940).

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

121346787880 is a wasteful number, since it uses less digits than its factorization.

121346787880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033669708 (or 3033669704 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 55.

It can be divided in two parts, 121346 and 787880, that added together give a triangular number (909226 = T₁₃₄₈).

The spelling of 121346787880 in words is "one hundred twenty-one billion, three hundred forty-six million, seven hundred eighty-seven thousand, eight hundred eighty".