22221110231231 has 4 divisors (see below), whose sum is σ = 22221136983264. Its totient is φ = 22221083479200.

The previous prime is 22221110231101. The next prime is 22221110231251. The reversal of 22221110231231 is 13213201112222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221110231231 is a prime.

It is a super-2 number, since 2×22221110231231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221110231197 and 22221110231206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221110231251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12088775 + ... + 13805096.

It is an arithmetic number, because the mean of its divisors is an integer number (5555284245816).

Almost surely, 2^{22221110231231} is an apocalyptic number.

22221110231231 is a deficient number, since it is larger than the sum of its proper divisors (26752033).

22221110231231 is an equidigital number, since it uses as much as digits as its factorization.

22221110231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26752032.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 22221110231231 its reverse (13213201112222), we get a palindrome (35434311343453).

The spelling of 22221110231231 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred ten million, two hundred thirty-one thousand, two hundred thirty-one".