231131033012222 has 128 divisors (see below), whose sum is σ = 439961290212096. Its totient is φ = 88813937590272.

The previous prime is 231131033012221. The next prime is 231131033012251. The reversal of 231131033012222 is 222210330131132.

It is a junction number, because it is equal to n+sod(n) for n = 231131033012191 and 231131033012200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231131033012221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86756588 + ... + 89381024.

It is an arithmetic number, because the mean of its divisors is an integer number (3437197579782).

Almost surely, 2^{231131033012222} is an apocalyptic number.

231131033012222 is a deficient number, since it is larger than the sum of its proper divisors (208830257199874).

231131033012222 is a wasteful number, since it uses less digits than its factorization.

231131033012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624710.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 231131033012222 its reverse (222210330131132), we get a palindrome (453341363143354).

The spelling of 231131033012222 in words is "two hundred thirty-one trillion, one hundred thirty-one billion, thirty-three million, twelve thousand, two hundred twenty-two".