121225893378 has 16 divisors (see below), whose sum is σ = 242504106240. Its totient is φ = 40399911216.

The previous prime is 121225893367. The next prime is 121225893403. The reversal of 121225893378 is 873398522121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121225893378.

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, 2149825 + ... + 2205492.

It is an arithmetic number, because the mean of its divisors is an integer number (15156506640).

Almost surely, 2^121225893378 is an apocalyptic number.

121225893378 is an abundant number, since it is smaller than the sum of its proper divisors (121278212862).

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

121225893378 is a wasteful number, since it uses less digits than its factorization.

121225893378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359961.

The product of its digits is 1451520, while the sum is 51.

The spelling of 121225893378 in words is "one hundred twenty-one billion, two hundred twenty-five million, eight hundred ninety-three thousand, three hundred seventy-eight".