22012031212 has 6 divisors (see below), whose sum is σ = 38521054628. Its totient is φ = 11006015604.

The previous prime is 22012031161. The next prime is 22012031219. The reversal of 22012031212 is 21213021022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22012031219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2751503898 + ... + 2751503905.

Almost surely, 2^22012031212 is an apocalyptic number.

It is an amenable number.

22012031212 is a deficient number, since it is larger than the sum of its proper divisors (16509023416).

22012031212 is a wasteful number, since it uses less digits than its factorization.

22012031212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503007807 (or 5503007805 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22012031212 its reverse (21213021022), we get a palindrome (43225052234).

The spelling of 22012031212 in words is "twenty-two billion, twelve million, thirty-one thousand, two hundred twelve".