231121310022 has 12 divisors (see below), whose sum is σ = 500762838420. Its totient is φ = 77040436668.

The previous prime is 231121310011. The next prime is 231121310033. The reversal of 231121310022 is 220013121132.

231121310022 is a `hidden beast` number, since 2 + 311 + 21 + 310 + 0 + 22 = 666.

It is an interprime number because it is at equal distance from previous prime (231121310011) and next prime (231121310033).

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12840072779 = 231121310022 / (2 + 3 + 1 + 1 + 2 + 1 + 3 + 1 + 0 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 231121309977 and 231121310004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6420036372 + ... + 6420036407.

It is an arithmetic number, because the mean of its divisors is an integer number (41730236535).

Almost surely, 2^231121310022 is an apocalyptic number.

231121310022 is an abundant number, since it is smaller than the sum of its proper divisors (269641528398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231121310022 is a wasteful number, since it uses less digits than its factorization.

231121310022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12840072787 (or 12840072784 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231121310022 its reverse (220013121132), we get a palindrome (451134431154).

The spelling of 231121310022 in words is "two hundred thirty-one billion, one hundred twenty-one million, three hundred ten thousand, twenty-two".