231123220242 has 16 divisors (see below), whose sum is σ = 462260708832. Its totient is φ = 77038695360.

The previous prime is 231123220241. The next prime is 231123220261. The reversal of 231123220242 is 242022321132.

It is not an unprimeable number, because it can be changed into a prime (231123220241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377863 + ... + 777834.

It is an arithmetic number, because the mean of its divisors is an integer number (28891294302).

Almost surely, 2^231123220242 is an apocalyptic number.

231123220242 is an abundant number, since it is smaller than the sum of its proper divisors (231137488590).

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

231123220242 is a wasteful number, since it uses less digits than its factorization.

231123220242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189033.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 231123220242 its reverse (242022321132), we get a palindrome (473145541374).

The spelling of 231123220242 in words is "two hundred thirty-one billion, one hundred twenty-three million, two hundred twenty thousand, two hundred forty-two".