210221102100 has 36 divisors (see below), whose sum is σ = 608239722944. Its totient is φ = 56058960480.

The previous prime is 210221102099. The next prime is 210221102101. The reversal of 210221102100 is 1201122012.

It is an interprime number because it is at equal distance from previous prime (210221102099) and next prime (210221102101).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221102101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350368204 + ... + 350368803.

Almost surely, 2^210221102100 is an apocalyptic number.

210221102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221102100 is an abundant number, since it is smaller than the sum of its proper divisors (398018620844).

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

210221102100 is a wasteful number, since it uses less digits than its factorization.

210221102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700737024 (or 700737017 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210221102100 its reverse (1201122012), we get a palindrome (211422224112).

The spelling of 210221102100 in words is "two hundred ten billion, two hundred twenty-one million, one hundred two thousand, one hundred".