121346787840 has 80 divisors (see below), whose sum is σ = 387930536928. Its totient is φ = 32359141376.

The previous prime is 121346787799. The next prime is 121346787853. The reversal of 121346787840 is 48787643121.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7892502 + ... + 7907861.

Almost surely, 2^121346787840 is an apocalyptic number.

121346787840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121346787840 is an abundant number, since it is smaller than the sum of its proper divisors (266583749088).

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

121346787840 is an equidigital number, since it uses as much as digits as its factorization.

121346787840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15800389 (or 15800373 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The spelling of 121346787840 in words is "one hundred twenty-one billion, three hundred forty-six million, seven hundred eighty-seven thousand, eight hundred forty".