22121011231 has 16 divisors (see below), whose sum is σ = 26506563840. Its totient is φ = 18223254720.

The previous prime is 22121011229. The next prime is 22121011243. The reversal of 22121011231 is 13211012122.

It is not a de Polignac number, because 22121011231 - 2¹ = 22121011229 is a prime.

It is a super-2 number, since 2×22121011231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121011831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2296110 + ... + 2305723.

It is an arithmetic number, because the mean of its divisors is an integer number (1656660240).

Almost surely, 2^22121011231 is an apocalyptic number.

22121011231 is a deficient number, since it is larger than the sum of its proper divisors (4385552609).

22121011231 is a wasteful number, since it uses less digits than its factorization.

22121011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601886.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 22121011231 its reverse (13211012122), we get a palindrome (35332023353).

The spelling of 22121011231 in words is "twenty-two billion, one hundred twenty-one million, eleven thousand, two hundred thirty-one".