212102102100 has 72 divisors (see below), whose sum is σ = 701350957888. Its totient is φ = 48480480000.

The previous prime is 212102102099. The next prime is 212102102111. The reversal of 212102102100 is 1201201212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50498401 + ... + 50502600.

Almost surely, 2^212102102100 is an apocalyptic number.

212102102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102102100 is an abundant number, since it is smaller than the sum of its proper divisors (489248855788).

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

212102102100 is a wasteful number, since it uses less digits than its factorization.

212102102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101001025 (or 101001018 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212102102100 its reverse (1201201212), we get a palindrome (213303303312).

The spelling of 212102102100 in words is "two hundred twelve billion, one hundred two million, one hundred two thousand, one hundred".