31221010222 has 8 divisors (see below), whose sum is σ = 48342209472. Its totient is φ = 15106940400.

The previous prime is 31221010217. The next prime is 31221010229. The reversal of 31221010222 is 22201012213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31221010196 and 31221010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221010229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251782279 + ... + 251782402.

It is an arithmetic number, because the mean of its divisors is an integer number (6042776184).

Almost surely, 2^31221010222 is an apocalyptic number.

31221010222 is a deficient number, since it is larger than the sum of its proper divisors (17121199250).

31221010222 is a wasteful number, since it uses less digits than its factorization.

31221010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503564714.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31221010222 its reverse (22201012213), we get a palindrome (53422022435).

The spelling of 31221010222 in words is "thirty-one billion, two hundred twenty-one million, ten thousand, two hundred twenty-two".