212072111100 has 54 divisors (see below), whose sum is σ = 664728253280. Its totient is φ = 56552562720.

The previous prime is 212072111089. The next prime is 212072111143. The reversal of 212072111100 is 1111270212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 117816940 + ... + 117818739.

Almost surely, 2^212072111100 is an apocalyptic number.

212072111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212072111100 is an abundant number, since it is smaller than the sum of its proper divisors (452656142180).

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

212072111100 is a wasteful number, since it uses less digits than its factorization.

212072111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235635699 (or 235635689 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

Adding to 212072111100 its reverse (1111270212), we get a palindrome (213183381312).

The spelling of 212072111100 in words is "two hundred twelve billion, seventy-two million, one hundred eleven thousand, one hundred".