113212009 has 2 divisors, whose sum is σ = 113212010. Its totient is φ = 113212008.

The previous prime is 113211953. The next prime is 113212019. The reversal of 113212009 is 900212311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73874025 + 39337984 = 8595^2 + 6272^2 .

It is a cyclic number.

It is not a de Polignac number, because 113212009 - 2⁷ = 113211881 is a prime.

It is not a weakly prime, because it can be changed into another prime (113212019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56606004 + 56606005.

It is an arithmetic number, because the mean of its divisors is an integer number (56606005).

Almost surely, 2^113212009 is an apocalyptic number.

It is an amenable number.

113212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

113212009 is an equidigital number, since it uses as much as digits as its factorization.

113212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 113212009 is about 10640.1132042850. The cubic root of 113212009 is about 483.7609766776.

The spelling of 113212009 in words is "one hundred thirteen million, two hundred twelve thousand, nine".