22231203121 has 2 divisors, whose sum is σ = 22231203122. Its totient is φ = 22231203120.

The previous prime is 22231203109. The next prime is 22231203149. The reversal of 22231203121 is 12130213222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13674028096 + 8557175025 = 116936^2 + 92505^2 .

It is a cyclic number.

It is not a de Polignac number, because 22231203121 - 2¹⁷ = 22231072049 is a prime.

It is not a weakly prime, because it can be changed into another prime (22231203101) 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 as a sum of consecutive naturals, namely, 11115601560 + 11115601561.

It is an arithmetic number, because the mean of its divisors is an integer number (11115601561).

Almost surely, 2^22231203121 is an apocalyptic number.

It is an amenable number.

22231203121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231203121 is an equidigital number, since it uses as much as digits as its factorization.

22231203121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22231203121 its reverse (12130213222), we get a palindrome (34361416343).

The spelling of 22231203121 in words is "twenty-two billion, two hundred thirty-one million, two hundred three thousand, one hundred twenty-one".