121323404144 has 40 divisors (see below), whose sum is σ = 248919849360. Its totient is φ = 57086839808.

The previous prime is 121323404129. The next prime is 121323404173. The reversal of 121323404144 is 441404323121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3030047 + ... + 3069825.

It is an arithmetic number, because the mean of its divisors is an integer number (6222996234).

Almost surely, 2^121323404144 is an apocalyptic number.

It is an amenable number.

121323404144 is an abundant number, since it is smaller than the sum of its proper divisors (127596445216).

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

121323404144 is a wasteful number, since it uses less digits than its factorization.

121323404144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51017 (or 51011 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 121323404144 its reverse (441404323121), we get a palindrome (562727727265).

The spelling of 121323404144 in words is "one hundred twenty-one billion, three hundred twenty-three million, four hundred four thousand, one hundred forty-four".