20111222210112 has 560 divisors, whose sum is σ = 68562174320640. Its totient is φ = 5772211891200.

The previous prime is 20111222210089. The next prime is 20111222210113. The reversal of 20111222210112 is 21101222211102.

It is a super-2 number, since 2×20111222210112² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20111222210113) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 82962939 + ... + 83204997.

It is an arithmetic number, because the mean of its divisors is an integer number (122432454144).

Almost surely, 2^{20111222210112} is an apocalyptic number.

20111222210112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111222210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34281087160320).

20111222210112 is an abundant number, since it is smaller than the sum of its proper divisors (48450952110528).

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

20111222210112 is a wasteful number, since it uses less digits than its factorization.

20111222210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242172 (or 242153 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20111222210112 its reverse (21101222211102), we get a palindrome (41212444421214).

The spelling of 20111222210112 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-two million, two hundred ten thousand, one hundred twelve".