212221021100100 has 36 divisors (see below), whose sum is σ = 614026154383824. Its totient is φ = 56592272293280.

The previous prime is 212221021100093. The next prime is 212221021100107. The reversal of 212221021100100 is 1001120122212.

It is an interprime number because it is at equal distance from previous prime (212221021100093) and next prime (212221021100107).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212221021100100.

It is not an unprimeable number, because it can be changed into a prime (212221021100107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 353701701534 + ... + 353701702133.

Almost surely, 2^{212221021100100} is an apocalyptic number.

212221021100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221021100100 is an abundant number, since it is smaller than the sum of its proper divisors (401805133283724).

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

212221021100100 is a wasteful number, since it uses less digits than its factorization.

212221021100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707403403684 (or 707403403677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212221021100100 its reverse (1001120122212), we get a palindrome (213222141222312).

The spelling of 212221021100100 in words is "two hundred twelve trillion, two hundred twenty-one billion, twenty-one million, one hundred thousand, one hundred".