121401375040 has 56 divisors (see below), whose sum is σ = 315367672032. Its totient is φ = 44145953280.

The previous prime is 121401375023. The next prime is 121401375149. The reversal of 121401375040 is 40573104121.

121401375040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 17240994 + ... + 17248033.

It is an arithmetic number, because the mean of its divisors is an integer number (5631565572).

Almost surely, 2^121401375040 is an apocalyptic number.

121401375040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121401375040 is an abundant number, since it is smaller than the sum of its proper divisors (193966296992).

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

121401375040 is a wasteful number, since it uses less digits than its factorization.

121401375040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34489055 (or 34489045 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 121401375040 its reverse (40573104121), we get a palindrome (161974479161).

The spelling of 121401375040 in words is "one hundred twenty-one billion, four hundred one million, three hundred seventy-five thousand, forty".