21222033121 has 8 divisors (see below), whose sum is σ = 21708385280. Its totient is φ = 20740669488.

The previous prime is 21222033101. The next prime is 21222033127. The reversal of 21222033121 is 12133022212.

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 21222033121 - 2⁵ = 21222033089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222033127) 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, 1238526 + ... + 1255543.

It is an arithmetic number, because the mean of its divisors is an integer number (2713548160).

Almost surely, 2^21222033121 is an apocalyptic number.

It is an amenable number.

21222033121 is a deficient number, since it is larger than the sum of its proper divisors (486352159).

21222033121 is a wasteful number, since it uses less digits than its factorization.

21222033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494263.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21222033121 its reverse (12133022212), we get a palindrome (33355055333).

The spelling of 21222033121 in words is "twenty-one billion, two hundred twenty-two million, thirty-three thousand, one hundred twenty-one".