212201222021100 has 432 divisors, whose sum is σ = 747746082021120. Its totient is φ = 51888213792000.

The previous prime is 212201222021093. The next prime is 212201222021111. The reversal of 212201222021100 is 1120222102212.

It is a happy number.

212201222021100 is a `hidden beast` number, since 2 + 1 + 220 + 12 + 220 + 211 + 0 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 45476611 + ... + 49925189.

Almost surely, 2^{212201222021100} is an apocalyptic number.

212201222021100 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 212201222021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373873041010560).

212201222021100 is an abundant number, since it is smaller than the sum of its proper divisors (535544860000020).

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

212201222021100 is a wasteful number, since it uses less digits than its factorization.

212201222021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4448772 (or 4448753 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212201222021100 its reverse (1120222102212), we get a palindrome (213321444123312).

The spelling of 212201222021100 in words is "two hundred twelve trillion, two hundred one billion, two hundred twenty-two million, twenty-one thousand, one hundred".