22011232100 has 144 divisors (see below), whose sum is σ = 59068927680. Its totient is φ = 6999436800.

The previous prime is 22011232073. The next prime is 22011232121. The reversal of 22011232100 is 123211022.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 231194 + ... + 312206.

Almost surely, 2^22011232100 is an apocalyptic number.

22011232100 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 22011232100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29534463840).

22011232100 is an abundant number, since it is smaller than the sum of its proper divisors (37057695580).

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

22011232100 is a wasteful number, since it uses less digits than its factorization.

22011232100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81070 (or 81063 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 22011232100 its reverse (123211022), we get a palindrome (22134443122).

The spelling of 22011232100 in words is "twenty-two billion, eleven million, two hundred thirty-two thousand, one hundred".