231012109 has 2 divisors, whose sum is σ = 231012110. Its totient is φ = 231012108.

The previous prime is 231012101. The next prime is 231012113. The reversal of 231012109 is 901210132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196084009 + 34928100 = 14003^2 + 5910^2 .

It is a cyclic number.

It is not a de Polignac number, because 231012109 - 2³ = 231012101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231012101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115506054 + 115506055.

It is an arithmetic number, because the mean of its divisors is an integer number (115506055).

Almost surely, 2^231012109 is an apocalyptic number.

It is an amenable number.

231012109 is a deficient number, since it is larger than the sum of its proper divisors (1).

231012109 is an equidigital number, since it uses as much as digits as its factorization.

231012109 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 231012109 is about 15199.0825052041. The cubic root of 231012109 is about 613.5899650358.

The spelling of 231012109 in words is "two hundred thirty-one million, twelve thousand, one hundred nine".