22031331212 has 48 divisors (see below), whose sum is σ = 44483671680. Its totient is φ = 9442137600.

The previous prime is 22031331211. The next prime is 22031331247. The reversal of 22031331212 is 21213313022.

It is not an unprimeable number, because it can be changed into a prime (22031331211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113948 + ... + 238844.

It is an arithmetic number, because the mean of its divisors is an integer number (926743160).

Almost surely, 2^22031331212 is an apocalyptic number.

22031331212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22031331212 is an abundant number, since it is smaller than the sum of its proper divisors (22452340468).

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

22031331212 is a wasteful number, since it uses less digits than its factorization.

22031331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125142 (or 125140 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 22031331212 its reverse (21213313022), we get a palindrome (43244644234).

The spelling of 22031331212 in words is "twenty-two billion, thirty-one million, three hundred thirty-one thousand, two hundred twelve".