20112212 has 12 divisors (see below), whose sum is σ = 36726816. Its totient is φ = 9618840.

The previous prime is 20112199. The next prime is 20112217. The reversal of 20112212 is 21221102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20112193 and 20112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109214 + ... + 109397.

It is an arithmetic number, because the mean of its divisors is an integer number (3060568).

Almost surely, 2^20112212 is an apocalyptic number.

It is an amenable number.

20112212 is a deficient number, since it is larger than the sum of its proper divisors (16614604).

20112212 is a wasteful number, since it uses less digits than its factorization.

20112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218638 (or 218636 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 20112212 is about 4484.6640899849. The cubic root of 20112212 is about 271.9484655827.

Adding to 20112212 its reverse (21221102), we get a palindrome (41333314).

The spelling of 20112212 in words is "twenty million, one hundred twelve thousand, two hundred twelve".