22100221212 has 96 divisors (see below), whose sum is σ = 53446848000. Its totient is φ = 7102225152.

The previous prime is 22100221211. The next prime is 22100221229. The reversal of 22100221212 is 21212200122.

It is a junction number, because it is equal to n+sod(n) for n = 22100221191 and 22100221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100221211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34370163 + ... + 34370805.

It is an arithmetic number, because the mean of its divisors is an integer number (556738000).

Almost surely, 2^22100221212 is an apocalyptic number.

It is an amenable number.

22100221212 is an abundant number, since it is smaller than the sum of its proper divisors (31346626788).

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

22100221212 is a wasteful number, since it uses less digits than its factorization.

22100221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275 (or 1273 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22100221212 its reverse (21212200122), we get a palindrome (43312421334).

The spelling of 22100221212 in words is "twenty-two billion, one hundred million, two hundred twenty-one thousand, two hundred twelve".