121552373893 has 4 divisors (see below), whose sum is σ = 123612583680. Its totient is φ = 119492164108.

The previous prime is 121552373881. The next prime is 121552373903. The reversal of 121552373893 is 398373255121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121552373893 - 2²¹ = 121550276741 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121552373993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030104805 + ... + 1030104922.

It is an arithmetic number, because the mean of its divisors is an integer number (30903145920).

Almost surely, 2^121552373893 is an apocalyptic number.

It is an amenable number.

121552373893 is a deficient number, since it is larger than the sum of its proper divisors (2060209787).

121552373893 is an equidigital number, since it uses as much as digits as its factorization.

121552373893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060209786.

The product of its digits is 1360800, while the sum is 49.

The spelling of 121552373893 in words is "one hundred twenty-one billion, five hundred fifty-two million, three hundred seventy-three thousand, eight hundred ninety-three".