21422555121 has 8 divisors (see below), whose sum is σ = 31160080224. Its totient is φ = 12983366720.

The previous prime is 21422555087. The next prime is 21422555137. The reversal of 21422555121 is 12155522412.

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 21422555121 - 2⁹ = 21422554609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21422555191) 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, 324584136 + ... + 324584201.

It is an arithmetic number, because the mean of its divisors is an integer number (3895010028).

Almost surely, 2^21422555121 is an apocalyptic number.

It is an amenable number.

21422555121 is a deficient number, since it is larger than the sum of its proper divisors (9737525103).

21422555121 is a wasteful number, since it uses less digits than its factorization.

21422555121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649168351.

The product of its digits is 8000, while the sum is 30.

The spelling of 21422555121 in words is "twenty-one billion, four hundred twenty-two million, five hundred fifty-five thousand, one hundred twenty-one".