22121131331 has 16 divisors (see below), whose sum is σ = 24061773120. Its totient is φ = 20214956160.

The previous prime is 22121131321. The next prime is 22121131367. The reversal of 22121131331 is 13313112122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22121131331 - 2¹⁴ = 22121114947 is a prime.

It is a super-2 number, since 2×22121131331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121131301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1840361 + ... + 1852341.

It is an arithmetic number, because the mean of its divisors is an integer number (1503860820).

Almost surely, 2^22121131331 is an apocalyptic number.

22121131331 is a deficient number, since it is larger than the sum of its proper divisors (1940641789).

22121131331 is a wasteful number, since it uses less digits than its factorization.

22121131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13406.

The product of its digits is 216, while the sum is 20.

Adding to 22121131331 its reverse (13313112122), we get a palindrome (35434243453).

The spelling of 22121131331 in words is "twenty-two billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred thirty-one".