213113213009 has 2 divisors, whose sum is σ = 213113213010. Its totient is φ = 213113213008.

The previous prime is 213113213003. The next prime is 213113213021. The reversal of 213113213009 is 900312311312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111871518784 + 101241694225 = 334472^2 + 318185^2 .

It is a cyclic number.

It is not a de Polignac number, because 213113213009 - 2¹⁶ = 213113147473 is a prime.

It is not a weakly prime, because it can be changed into another prime (213113213003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556606504 + 106556606505.

It is an arithmetic number, because the mean of its divisors is an integer number (106556606505).

Almost surely, 2^213113213009 is an apocalyptic number.

It is an amenable number.

213113213009 is a deficient number, since it is larger than the sum of its proper divisors (1).

213113213009 is an equidigital number, since it uses as much as digits as its factorization.

213113213009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 213113213009 in words is "two hundred thirteen billion, one hundred thirteen million, two hundred thirteen thousand, nine".