22111100121000 has 256 divisors, whose sum is σ = 75678601190400. Its totient is φ = 5330319648000.

The previous prime is 22111100120939. The next prime is 22111100121007. The reversal of 22111100121000 is 12100111122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22111100121007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4035399 + ... + 7778601.

It is an arithmetic number, because the mean of its divisors is an integer number (295619535900).

Almost surely, 2^{22111100121000} is an apocalyptic number.

22111100121000 is a gapful number since it is divisible by the number (20) 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 22111100121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37839300595200).

22111100121000 is an abundant number, since it is smaller than the sum of its proper divisors (53567501069400).

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

22111100121000 is a wasteful number, since it uses less digits than its factorization.

22111100121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743417 (or 3743403 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 22111100121000 its reverse (12100111122), we get a palindrome (22123200232122).

The spelling of 22111100121000 in words is "twenty-two trillion, one hundred eleven billion, one hundred million, one hundred twenty-one thousand".