212111102100 has 72 divisors (see below), whose sum is σ = 615327734560. Its totient is φ = 56413687680.

The previous prime is 212111102083. The next prime is 212111102117. The reversal of 212111102100 is 1201111212.

It is an interprime number because it is at equal distance from previous prime (212111102083) and next prime (212111102117).

It is a super-2 number, since 2×212111102100² (a number of 23 digits) contains 22 as substring.

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, 819067 + ... + 1046466.

Almost surely, 2^212111102100 is an apocalyptic number.

212111102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111102100 is an abundant number, since it is smaller than the sum of its proper divisors (403216632460).

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

212111102100 is a wasteful number, since it uses less digits than its factorization.

212111102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865929 (or 1865922 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 212111102100 its reverse (1201111212), we get a palindrome (213312213312).

The spelling of 212111102100 in words is "two hundred twelve billion, one hundred eleven million, one hundred two thousand, one hundred".