231021203222 has 4 divisors (see below), whose sum is σ = 346531804836. Its totient is φ = 115510601610.

The previous prime is 231021203221. The next prime is 231021203267. The reversal of 231021203222 is 222302120132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 231021203194 and 231021203203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021203221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57755300804 + ... + 57755300807.

It is an arithmetic number, because the mean of its divisors is an integer number (86632951209).

Almost surely, 2^231021203222 is an apocalyptic number.

231021203222 is a deficient number, since it is larger than the sum of its proper divisors (115510601614).

231021203222 is a wasteful number, since it uses less digits than its factorization.

231021203222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115510601613.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231021203222 its reverse (222302120132), we get a palindrome (453323323354).

The spelling of 231021203222 in words is "two hundred thirty-one billion, twenty-one million, two hundred three thousand, two hundred twenty-two".