22111200000 has 648 divisors, whose sum is σ = 82824605136. Its totient is φ = 5667840000.

The previous prime is 22111199989. The next prime is 22111200019. The reversal of 22111200000 is 211122.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 266399959 + ... + 266400041.

Almost surely, 2^22111200000 is an apocalyptic number.

22111200000 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 22111200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41412302568).

22111200000 is an abundant number, since it is smaller than the sum of its proper divisors (60713405136).

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

22111200000 is an frugal number, since it uses more digits than its factorization.

22111200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 22111200000 its reverse (211122), we get a palindrome (22111411122).

It can be divided in two parts, 22111 and 200000, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 22111200000 in words is "twenty-two billion, one hundred eleven million, two hundred thousand".