212122221100 has 36 divisors (see below), whose sum is σ = 467175461704. Its totient is φ = 83582484480.

The previous prime is 212122221089. The next prime is 212122221149. The reversal of 212122221100 is 1122221212.

It is a happy number.

212122221100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 15823317 + ... + 15836716.

Almost surely, 2^212122221100 is an apocalyptic number.

212122221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212122221100 is an abundant number, since it is smaller than the sum of its proper divisors (255053240604).

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

212122221100 is a wasteful number, since it uses less digits than its factorization.

212122221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31660114 (or 31660107 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212122221100 its reverse (1122221212), we get a palindrome (213244442312).

The spelling of 212122221100 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred".