22011212112 has 160 divisors (see below), whose sum is σ = 62186019840. Its totient is φ = 6685056000.

The previous prime is 22011212099. The next prime is 22011212189. The reversal of 22011212112 is 21121211022.

It is a junction number, because it is equal to n+sod(n) for n = 22011212091 and 22011212100.

It is a congruent 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, 2650687 + ... + 2658977.

It is an arithmetic number, because the mean of its divisors is an integer number (388662624).

Almost surely, 2^22011212112 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 22011212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31093009920).

22011212112 is an abundant number, since it is smaller than the sum of its proper divisors (40174807728).

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

22011212112 is a wasteful number, since it uses less digits than its factorization.

22011212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8433 (or 8427 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22011212112 its reverse (21121211022), we get a palindrome (43132423134).

The spelling of 22011212112 in words is "twenty-two billion, eleven million, two hundred twelve thousand, one hundred twelve".