121531455994 has 16 divisors (see below), whose sum is σ = 196542414432. Its totient is φ = 56027906928.

The previous prime is 121531455977. The next prime is 121531456021. The reversal of 121531455994 is 499554135121.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2623864 + ... + 2669779.

It is an arithmetic number, because the mean of its divisors is an integer number (12283900902).

Almost surely, 2^121531455994 is an apocalyptic number.

121531455994 is a deficient number, since it is larger than the sum of its proper divisors (75010958438).

121531455994 is a wasteful number, since it uses less digits than its factorization.

121531455994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294541.

The product of its digits is 972000, while the sum is 49.

The spelling of 121531455994 in words is "one hundred twenty-one billion, five hundred thirty-one million, four hundred fifty-five thousand, nine hundred ninety-four".