231323212113 has 16 divisors (see below), whose sum is σ = 352499450880. Its totient is φ = 132182091216.

The previous prime is 231323212097. The next prime is 231323212117. The reversal of 231323212113 is 311212323132.

It is not a de Polignac number, because 231323212113 - 2⁴ = 231323212097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231323212117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1639708 + ... + 1775186.

It is an arithmetic number, because the mean of its divisors is an integer number (22031215680).

Almost surely, 2^231323212113 is an apocalyptic number.

It is an amenable number.

231323212113 is a deficient number, since it is larger than the sum of its proper divisors (121176238767).

231323212113 is a wasteful number, since it uses less digits than its factorization.

231323212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216796.

The product of its digits is 1296, while the sum is 24.

Adding to 231323212113 its reverse (311212323132), we get a palindrome (542535535245).

The spelling of 231323212113 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred twelve thousand, one hundred thirteen".