22121011231231 has 8 divisors (see below), whose sum is σ = 24133744672128. Its totient is φ = 20108566527000.

The previous prime is 22121011231201. The next prime is 22121011231273. The reversal of 22121011231231 is 13213211012122.

It is a happy number.

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 22121011231231 - 2¹⁷ = 22121011100159 is a prime.

It is a super-2 number, since 2×22121011231231² (a number of 27 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 (22121011231201) 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, 72023955 + ... + 72330436.

It is an arithmetic number, because the mean of its divisors is an integer number (3016718084016).

Almost surely, 2^{22121011231231} is an apocalyptic number.

22121011231231 is a deficient number, since it is larger than the sum of its proper divisors (2012733440897).

22121011231231 is a wasteful number, since it uses less digits than its factorization.

22121011231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144368333.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 22121011231231 its reverse (13213211012122), we get a palindrome (35334222243353).

The spelling of 22121011231231 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, two hundred thirty-one thousand, two hundred thirty-one".