20113312212 has 36 divisors (see below), whose sum is σ = 58105124896. Its totient is φ = 5746660560.

The previous prime is 20113312111. The next prime is 20113312217. The reversal of 20113312212 is 21221331102.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113312217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39907114 + ... + 39907617.

Almost surely, 2^20113312212 is an apocalyptic number.

It is an amenable number.

20113312212 is an abundant number, since it is smaller than the sum of its proper divisors (37991812684).

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

20113312212 is a wasteful number, since it uses less digits than its factorization.

20113312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79814748 (or 79814743 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20113312212 its reverse (21221331102), we get a palindrome (41334643314).

The spelling of 20113312212 in words is "twenty billion, one hundred thirteen million, three hundred twelve thousand, two hundred twelve".