23212113209 has 2 divisors, whose sum is σ = 23212113210. Its totient is φ = 23212113208.

The previous prime is 23212113187. The next prime is 23212113251. The reversal of 23212113209 is 90231121232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23186761984 + 25351225 = 152272^2 + 5035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23212113209 is a prime.

It is not a weakly prime, because it can be changed into another prime (23212313209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606056604 + 11606056605.

It is an arithmetic number, because the mean of its divisors is an integer number (11606056605).

Almost surely, 2^23212113209 is an apocalyptic number.

It is an amenable number.

23212113209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23212113209 is an equidigital number, since it uses as much as digits as its factorization.

23212113209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 23212113209 in words is "twenty-three billion, two hundred twelve million, one hundred thirteen thousand, two hundred nine".