22111022222212 has 96 divisors (see below), whose sum is σ = 49421473871616. Its totient is φ = 8404126924800.

The previous prime is 22111022222173. The next prime is 22111022222213. The reversal of 22111022222212 is 21222222011122.

It is a super-2 number, since 2×22111022222212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (22111022222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337349508 + ... + 337415044.

It is an arithmetic number, because the mean of its divisors is an integer number (514807019496).

Almost surely, 2^{22111022222212} is an apocalyptic number.

22111022222212 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 22111022222212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24710736935808).

22111022222212 is an abundant number, since it is smaller than the sum of its proper divisors (27310451649404).

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

22111022222212 is a wasteful number, since it uses less digits than its factorization.

22111022222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92317 (or 92315 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22111022222212 its reverse (21222222011122), we get a palindrome (43333244233334).

The spelling of 22111022222212 in words is "twenty-two trillion, one hundred eleven billion, twenty-two million, two hundred twenty-two thousand, two hundred twelve".