23221121213 has 2 divisors, whose sum is σ = 23221121214. Its totient is φ = 23221121212.

The previous prime is 23221121173. The next prime is 23221121243. The reversal of 23221121213 is 31212112232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17328563044 + 5892558169 = 131638^2 + 76763^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221121213 - 2⁸ = 23221120957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23221121243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610560606 + 11610560607.

It is an arithmetic number, because the mean of its divisors is an integer number (11610560607).

Almost surely, 2^23221121213 is an apocalyptic number.

It is an amenable number.

23221121213 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221121213 is an equidigital number, since it uses as much as digits as its factorization.

23221121213 is an evil number, because the sum of its binary digits is even.

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

Adding to 23221121213 its reverse (31212112232), we get a palindrome (54433233445).

The spelling of 23221121213 in words is "twenty-three billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred thirteen".