22012221100 has 36 divisors (see below), whose sum is σ = 47935367704. Its totient is φ = 8773764480.

The previous prime is 22012221067. The next prime is 22012221137. The reversal of 22012221100 is 112221022.

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, 360609 + ... + 417208.

Almost surely, 2^22012221100 is an apocalyptic number.

22012221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012221100 is an abundant number, since it is smaller than the sum of its proper divisors (25923146604).

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

22012221100 is a wasteful number, since it uses less digits than its factorization.

22012221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778114 (or 778107 counting only the distinct ones).

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

Adding to 22012221100 its reverse (112221022), we get a palindrome (22124442122).

The spelling of 22012221100 in words is "twenty-two billion, twelve million, two hundred twenty-one thousand, one hundred".