121401012144 has 40 divisors (see below), whose sum is σ = 315352007152. Its totient is φ = 40243426560.

The previous prime is 121401012127. The next prime is 121401012157. The reversal of 121401012144 is 441210104121.

It is a self number, because there is not a number n which added to its sum of digits gives 121401012144.

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, 6978019 + ... + 6995394.

Almost surely, 2^121401012144 is an apocalyptic number.

It is an amenable number.

121401012144 is an abundant number, since it is smaller than the sum of its proper divisors (193950995008).

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

121401012144 is a wasteful number, since it uses less digits than its factorization.

121401012144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13973605 (or 13973599 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121401012144 its reverse (441210104121), we get a palindrome (562611116265).

The spelling of 121401012144 in words is "one hundred twenty-one billion, four hundred one million, twelve thousand, one hundred forty-four".