8856388121 has 4 divisors (see below), whose sum is σ = 10121586432. Its totient is φ = 7591189812.

The previous prime is 8856388087. The next prime is 8856388157. The reversal of 8856388121 is 1218836588.

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 a de Polignac number, because none of the positive numbers 2^k-8856388121 is a prime.

It is a super-2 number, since 2×8856388121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8856388121.

It is not an unprimeable number, because it can be changed into a prime (8856388621) 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, 632599145 + ... + 632599158.

It is an arithmetic number, because the mean of its divisors is an integer number (2530396608).

Almost surely, 2^8856388121 is an apocalyptic number.

It is an amenable number.

8856388121 is a deficient number, since it is larger than the sum of its proper divisors (1265198311).

8856388121 is a wasteful number, since it uses less digits than its factorization.

8856388121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265198310.

The product of its digits is 737280, while the sum is 50.

The square root of 8856388121 is about 94108.3849664843. The cubic root of 8856388121 is about 2068.9605679418.

The spelling of 8856388121 in words is "eight billion, eight hundred fifty-six million, three hundred eighty-eight thousand, one hundred twenty-one".