121434604721 has 16 divisors (see below), whose sum is σ = 124178443200. Its totient is φ = 118708294848.

The previous prime is 121434604717. The next prime is 121434604751. The reversal of 121434604721 is 127406434121.

It is a cyclic number.

It is not a de Polignac number, because 121434604721 - 2² = 121434604717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121434604751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20138735 + ... + 20144763.

It is an arithmetic number, because the mean of its divisors is an integer number (7761152700).

Almost surely, 2^121434604721 is an apocalyptic number.

It is an amenable number.

121434604721 is a deficient number, since it is larger than the sum of its proper divisors (2743838479).

121434604721 is an equidigital number, since it uses as much as digits as its factorization.

121434604721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7408.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 121434604721 in words is "one hundred twenty-one billion, four hundred thirty-four million, six hundred four thousand, seven hundred twenty-one".