31211212422 has 32 divisors (see below), whose sum is σ = 67233795552. Its totient is φ = 9602072064.

The previous prime is 31211212381. The next prime is 31211212423. The reversal of 31211212422 is 22421211213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211212423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 608478 + ... + 657774.

It is an arithmetic number, because the mean of its divisors is an integer number (2101056111).

Almost surely, 2^31211212422 is an apocalyptic number.

31211212422 is an abundant number, since it is smaller than the sum of its proper divisors (36022583130).

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

31211212422 is a wasteful number, since it uses less digits than its factorization.

31211212422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57432.

The product of its digits is 384, while the sum is 21.

Adding to 31211212422 its reverse (22421211213), we get a palindrome (53632423635).

The spelling of 31211212422 in words is "thirty-one billion, two hundred eleven million, two hundred twelve thousand, four hundred twenty-two".