212102111100 has 144 divisors (see below), whose sum is σ = 692556923520. Its totient is φ = 49645612800.

The previous prime is 212102111063. The next prime is 212102111113. The reversal of 212102111100 is 1111201212.

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 47 ways as a sum of consecutive naturals, for example, 1012462 + ... + 1203861.

It is an arithmetic number, because the mean of its divisors is an integer number (4809423080).

Almost surely, 2^212102111100 is an apocalyptic number.

212102111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102111100 is an abundant number, since it is smaller than the sum of its proper divisors (480454812420).

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

212102111100 is a wasteful number, since it uses less digits than its factorization.

212102111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216380 (or 2216373 counting only the distinct ones).

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

Adding to 212102111100 its reverse (1111201212), we get a palindrome (213213312312).

The spelling of 212102111100 in words is "two hundred twelve billion, one hundred two million, one hundred eleven thousand, one hundred".