212211222100 has 36 divisors (see below), whose sum is σ = 471207625504. Its totient is φ = 82910429280.

The previous prime is 212211222059. The next prime is 212211222103. The reversal of 212211222100 is 1222112212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211222103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24671424 + ... + 24680023.

Almost surely, 2^212211222100 is an apocalyptic number.

212211222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212211222100 is an abundant number, since it is smaller than the sum of its proper divisors (258996403404).

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

212211222100 is a wasteful number, since it uses less digits than its factorization.

212211222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49351504 (or 49351497 counting only the distinct ones).

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

Adding to 212211222100 its reverse (1222112212), we get a palindrome (213433334312).

The spelling of 212211222100 in words is "two hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, one hundred".