20112122212 has 96 divisors (see below), whose sum is σ = 46459526400. Its totient is φ = 7395328512.

The previous prime is 20112122207. The next prime is 20112122249. The reversal of 20112122212 is 21222121102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339114 + ... + 393982.

It is an arithmetic number, because the mean of its divisors is an integer number (483953400).

Almost surely, 2^20112122212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112122212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23229763200).

20112122212 is an abundant number, since it is smaller than the sum of its proper divisors (26347404188).

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

20112122212 is a wasteful number, since it uses less digits than its factorization.

20112122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54965 (or 54963 counting only the distinct ones).

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

Adding to 20112122212 its reverse (21222121102), we get a palindrome (41334243314).

The spelling of 20112122212 in words is "twenty billion, one hundred twelve million, one hundred twenty-two thousand, two hundred twelve".