31123222233222 has 48 divisors (see below), whose sum is σ = 73775339300592. Its totient is φ = 8724569031360.

The previous prime is 31123222233203. The next prime is 31123222233239. The reversal of 31123222233222 is 22233222232113.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 31123222233222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 998675929 + ... + 998707092.

It is an arithmetic number, because the mean of its divisors is an integer number (1536986235429).

Almost surely, 2^{31123222233222} is an apocalyptic number.

31123222233222 is an abundant number, since it is smaller than the sum of its proper divisors (42652117067370).

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

31123222233222 is a wasteful number, since it uses less digits than its factorization.

31123222233222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997383093 (or 1997383086 counting only the distinct ones).

The product of its digits is 20736, while the sum is 30.

Adding to 31123222233222 its reverse (22233222232113), we get a palindrome (53356444465335).

The spelling of 31123222233222 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred twenty-two million, two hundred thirty-three thousand, two hundred twenty-two".