23213221121 has 2 divisors, whose sum is σ = 23213221122. Its totient is φ = 23213221120.

The previous prime is 23213221103. The next prime is 23213221147. The reversal of 23213221121 is 12112231232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22114961521 + 1098259600 = 148711^2 + 33140^2 .

It is a cyclic number.

It is not a de Polignac number, because 23213221121 - 2²² = 23209026817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23213221093 and 23213221102.

It is not a weakly prime, because it can be changed into another prime (23213221721) 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, 11606610560 + 11606610561.

It is an arithmetic number, because the mean of its divisors is an integer number (11606610561).

Almost surely, 2^23213221121 is an apocalyptic number.

It is an amenable number.

23213221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213221121 is an equidigital number, since it uses as much as digits as its factorization.

23213221121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

Adding to 23213221121 its reverse (12112231232), we get a palindrome (35325452353).

The spelling of 23213221121 in words is "twenty-three billion, two hundred thirteen million, two hundred twenty-one thousand, one hundred twenty-one".