22001231231 has 24 divisors (see below), whose sum is σ = 25774977744. Its totient is φ = 18724608000.

The previous prime is 22001231209. The next prime is 22001231237. The reversal of 22001231231 is 13213210022.

It is not a de Polignac number, because 22001231231 - 2⁶ = 22001231167 is a prime.

It is a super-2 number, since 2×22001231231² (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 (22001231237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9772856 + ... + 9775106.

It is an arithmetic number, because the mean of its divisors is an integer number (1073957406).

Almost surely, 2^22001231231 is an apocalyptic number.

22001231231 is a deficient number, since it is larger than the sum of its proper divisors (3773746513).

22001231231 is a wasteful number, since it uses less digits than its factorization.

22001231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591 (or 3584 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22001231231 its reverse (13213210022), we get a palindrome (35214441253).

The spelling of 22001231231 in words is "twenty-two billion, one million, two hundred thirty-one thousand, two hundred thirty-one".