121506404561164 has 12 divisors (see below), whose sum is σ = 243012809122384. Its totient is φ = 52074173383344.

The previous prime is 121506404561071. The next prime is 121506404561183. The reversal of 121506404561164 is 461165404605121.

121506404561164 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2169757224279 + ... + 2169757224334.

Almost surely, 2^{121506404561164} is an apocalyptic number.

121506404561164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121506404561164 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121506404561164 is a wasteful number, since it uses less digits than its factorization.

121506404561164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339514448624 (or 4339514448622 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 121506404561164 in words is "one hundred twenty-one trillion, five hundred six billion, four hundred four million, five hundred sixty-one thousand, one hundred sixty-four".