23212121111213 has 2 divisors, whose sum is σ = 23212121111214. Its totient is φ = 23212121111212.

The previous prime is 23212121111209. The next prime is 23212121111227. The reversal of 23212121111213 is 31211112121232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23006815157764 + 205305953449 = 4796542^2 + 453107^2 .

It is a cyclic number.

It is not a de Polignac number, because 23212121111213 - 2² = 23212121111209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23212121111233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606060555606 + 11606060555607.

It is an arithmetic number, because the mean of its divisors is an integer number (11606060555607).

Almost surely, 2^{23212121111213} is an apocalyptic number.

It is an amenable number.

23212121111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

23212121111213 is an equidigital number, since it uses as much as digits as its factorization.

23212121111213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

Adding to 23212121111213 its reverse (31211112121232), we get a palindrome (54423233232445).

The spelling of 23212121111213 in words is "twenty-three trillion, two hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".