212220211100 has 72 divisors (see below), whose sum is σ = 482087144448. Its totient is φ = 80935940800.

The previous prime is 212220211087. The next prime is 212220211103. The reversal of 212220211100 is 1112022212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220211103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 566957 + ... + 863643.

It is an arithmetic number, because the mean of its divisors is an integer number (6695654784).

Almost surely, 2^212220211100 is an apocalyptic number.

212220211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212220211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241043572224).

212220211100 is an abundant number, since it is smaller than the sum of its proper divisors (269866933348).

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

212220211100 is a wasteful number, since it uses less digits than its factorization.

212220211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297035 (or 297028 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212220211100 its reverse (1112022212), we get a palindrome (213332233312).

The spelling of 212220211100 in words is "two hundred twelve billion, two hundred twenty million, two hundred eleven thousand, one hundred".