31212223222 has 8 divisors (see below), whose sum is σ = 47022782400. Its totient is φ = 15537962424.

The previous prime is 31212223183. The next prime is 31212223249. The reversal of 31212223222 is 22232221213.

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

It is a super-2 number, since 2×31212223222² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31212223193 and 31212223202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34074022 + ... + 34074937.

It is an arithmetic number, because the mean of its divisors is an integer number (5877847800).

Almost surely, 2^31212223222 is an apocalyptic number.

31212223222 is a deficient number, since it is larger than the sum of its proper divisors (15810559178).

31212223222 is a wasteful number, since it uses less digits than its factorization.

31212223222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68149190.

The product of its digits is 1152, while the sum is 22.

Adding to 31212223222 its reverse (22232221213), we get a palindrome (53444444435).

The spelling of 31212223222 in words is "thirty-one billion, two hundred twelve million, two hundred twenty-three thousand, two hundred twenty-two".