121785351974 has 32 divisors (see below), whose sum is σ = 216698436864. Its totient is φ = 50602632480.

The previous prime is 121785351959. The next prime is 121785351977. The reversal of 121785351974 is 479153587121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121785351977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2037644 + ... + 2096559.

It is an arithmetic number, because the mean of its divisors is an integer number (6771826152).

Almost surely, 2^121785351974 is an apocalyptic number.

121785351974 is a deficient number, since it is larger than the sum of its proper divisors (94913084890).

121785351974 is a wasteful number, since it uses less digits than its factorization.

121785351974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134332.

The product of its digits is 2116800, while the sum is 53.

The spelling of 121785351974 in words is "one hundred twenty-one billion, seven hundred eighty-five million, three hundred fifty-one thousand, nine hundred seventy-four".