231111202213 has 16 divisors (see below), whose sum is σ = 240917473152. Its totient is φ = 221555880000.

The previous prime is 231111202211. The next prime is 231111202247. The reversal of 231111202213 is 312202111132.

It is a cyclic number.

It is not a de Polignac number, because 231111202213 - 2¹ = 231111202211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111202211) 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, 251478 + ... + 724888.

It is an arithmetic number, because the mean of its divisors is an integer number (15057342072).

Almost surely, 2^231111202213 is an apocalyptic number.

It is an amenable number.

231111202213 is a deficient number, since it is larger than the sum of its proper divisors (9806270939).

231111202213 is a wasteful number, since it uses less digits than its factorization.

231111202213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473676.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231111202213 its reverse (312202111132), we get a palindrome (543313313345).

The spelling of 231111202213 in words is "two hundred thirty-one billion, one hundred eleven million, two hundred two thousand, two hundred thirteen".