212221221102 has 64 divisors (see below), whose sum is σ = 531071723520. Its totient is φ = 62234956800.

The previous prime is 212221221013. The next prime is 212221221151. The reversal of 212221221102 is 201122122212.

It is a happy number.

212221221102 is a `hidden beast` number, since 212 + 221 + 221 + 10 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5744083 + ... + 5780910.

It is an arithmetic number, because the mean of its divisors is an integer number (8297995680).

Almost surely, 2^212221221102 is an apocalyptic number.

212221221102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212221221102 is an abundant number, since it is smaller than the sum of its proper divisors (318850502418).

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

212221221102 is a wasteful number, since it uses less digits than its factorization.

212221221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11525046 (or 11525040 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212221221102 its reverse (201122122212), we get a palindrome (413343343314).

The spelling of 212221221102 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred two".