21775113121 has 8 divisors (see below), whose sum is σ = 21889280000. Its totient is φ = 21660994080.

The previous prime is 21775113089. The next prime is 21775113149. The reversal of 21775113121 is 12131157712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21775113121 - 2⁵ = 21775113089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21775110121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239205 + ... + 1256653.

It is an arithmetic number, because the mean of its divisors is an integer number (2736160000).

Almost surely, 2^21775113121 is an apocalyptic number.

It is an amenable number.

21775113121 is a deficient number, since it is larger than the sum of its proper divisors (114166879).

21775113121 is a wasteful number, since it uses less digits than its factorization.

21775113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23919.

The product of its digits is 2940, while the sum is 31.

The spelling of 21775113121 in words is "twenty-one billion, seven hundred seventy-five million, one hundred thirteen thousand, one hundred twenty-one".