20112212212 has 12 divisors (see below), whose sum is σ = 35218786176. Its totient is φ = 10049701880.

The previous prime is 20112212203. The next prime is 20112212251. The reversal of 20112212212 is 21221221102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1593988 + ... + 1606555.

It is an arithmetic number, because the mean of its divisors is an integer number (2934898848).

Almost surely, 2^20112212212 is an apocalyptic number.

It is an amenable number.

20112212212 is a deficient number, since it is larger than the sum of its proper divisors (15106573964).

20112212212 is a wasteful number, since it uses less digits than its factorization.

20112212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202118 (or 3202116 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20112212212 its reverse (21221221102), we get a palindrome (41333433314).

It can be divided in two parts, 20112 and 212212, that added together give a square (232324 = 482²).

The spelling of 20112212212 in words is "twenty billion, one hundred twelve million, two hundred twelve thousand, two hundred twelve".