23221131121 has 2 divisors, whose sum is σ = 23221131122. Its totient is φ = 23221131120.

The previous prime is 23221131107. The next prime is 23221131127. The reversal of 23221131121 is 12113112232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22711997025 + 509134096 = 150705^2 + 22564^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221131121 - 2¹⁵ = 23221098353 is a prime.

It is not a weakly prime, because it can be changed into another prime (23221131127) 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, 11610565560 + 11610565561.

It is an arithmetic number, because the mean of its divisors is an integer number (11610565561).

Almost surely, 2^23221131121 is an apocalyptic number.

It is an amenable number.

23221131121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221131121 is an equidigital number, since it uses as much as digits as its factorization.

23221131121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

Adding to 23221131121 its reverse (12113112232), we get a palindrome (35334243353).

The spelling of 23221131121 in words is "twenty-three billion, two hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty-one".