22201221100 has 36 divisors (see below), whose sum is σ = 48305890864. Its totient is φ = 8856665280.

The previous prime is 22201221089. The next prime is 22201221131. The reversal of 22201221100 is 112210222.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260304 + ... + 334903.

Almost surely, 2^22201221100 is an apocalyptic number.

22201221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22201221100 is an abundant number, since it is smaller than the sum of its proper divisors (26104669764).

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

22201221100 is a wasteful number, since it uses less digits than its factorization.

22201221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595594 (or 595587 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22201221100 its reverse (112210222), we get a palindrome (22313431322).

It can be divided in two parts, 2220122 and 1100, that added together give a palindrome (2221222).

The spelling of 22201221100 in words is "twenty-two billion, two hundred one million, two hundred twenty-one thousand, one hundred".