231211220322 has 96 divisors (see below), whose sum is σ = 484435733184. Its totient is φ = 73558625280.

The previous prime is 231211220311. The next prime is 231211220327. The reversal of 231211220322 is 223022112132.

It is not an unprimeable number, because it can be changed into a prime (231211220327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151812253 + ... + 151813775.

It is an arithmetic number, because the mean of its divisors is an integer number (5046205554).

Almost surely, 2^231211220322 is an apocalyptic number.

231211220322 is an abundant number, since it is smaller than the sum of its proper divisors (253224512862).

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

231211220322 is a wasteful number, since it uses less digits than its factorization.

231211220322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936 (or 1905 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 231211220322 its reverse (223022112132), we get a palindrome (454233332454).

The spelling of 231211220322 in words is "two hundred thirty-one billion, two hundred eleven million, two hundred twenty thousand, three hundred twenty-two".