121571901468 has 36 divisors (see below), whose sum is σ = 307322510040. Its totient is φ = 40521889056.

The previous prime is 121571901467. The next prime is 121571901497. The reversal of 121571901468 is 864109175121.

121571901468 is a `hidden beast` number, since 1 + 2 + 1 + 571 + 9 + 0 + 14 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121571901467) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 730903 + ... + 881681.

It is an arithmetic number, because the mean of its divisors is an integer number (8536736390).

Almost surely, 2^121571901468 is an apocalyptic number.

121571901468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121571901468 is an abundant number, since it is smaller than the sum of its proper divisors (185750608572).

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

121571901468 is a wasteful number, since it uses less digits than its factorization.

121571901468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173186 (or 173181 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 121571901468 in words is "one hundred twenty-one billion, five hundred seventy-one million, nine hundred one thousand, four hundred sixty-eight".