22231221023 has 16 divisors (see below), whose sum is σ = 25214595840. Its totient is φ = 19422955200.

The previous prime is 22231221013. The next prime is 22231221037. The reversal of 22231221023 is 32012213222.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-22231221023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22231220986 and 22231221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231221013) 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, 337643 + ... + 398076.

It is an arithmetic number, because the mean of its divisors is an integer number (1575912240).

Almost surely, 2^22231221023 is an apocalyptic number.

22231221023 is a deficient number, since it is larger than the sum of its proper divisors (2983374817).

22231221023 is a wasteful number, since it uses less digits than its factorization.

22231221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735838.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22231221023 its reverse (32012213222), we get a palindrome (54243434245).

The spelling of 22231221023 in words is "twenty-two billion, two hundred thirty-one million, two hundred twenty-one thousand, twenty-three".