31222104212 has 24 divisors (see below), whose sum is σ = 60739779072. Its totient is φ = 13945356000.

The previous prime is 31222104157. The next prime is 31222104253. The reversal of 31222104212 is 21240122213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9682664 + ... + 9685887.

It is an arithmetic number, because the mean of its divisors is an integer number (2530824128).

Almost surely, 2^31222104212 is an apocalyptic number.

It is an amenable number.

31222104212 is a deficient number, since it is larger than the sum of its proper divisors (29517674860).

31222104212 is a wasteful number, since it uses less digits than its factorization.

31222104212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19368599 (or 19368597 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31222104212 its reverse (21240122213), we get a palindrome (52462226425).

The spelling of 31222104212 in words is "thirty-one billion, two hundred twenty-two million, one hundred four thousand, two hundred twelve".