212100011100 has 108 divisors (see below), whose sum is σ = 674179506000. Its totient is φ = 55763366400.

The previous prime is 212100011059. The next prime is 212100011107. The reversal of 212100011100 is 1110001212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100011107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1595725 + ... + 1723524.

Almost surely, 2^212100011100 is an apocalyptic number.

212100011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100011100 is an abundant number, since it is smaller than the sum of its proper divisors (462079494900).

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

212100011100 is a wasteful number, since it uses less digits than its factorization.

212100011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319340 (or 3319330 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 212100011100 its reverse (1110001212), we get a palindrome (213210012312).

The spelling of 212100011100 in words is "two hundred twelve billion, one hundred million, eleven thousand, one hundred".