100211210221 has 4 divisors (see below), whose sum is σ = 100306741500. Its totient is φ = 100115678944.

The previous prime is 100211210171. The next prime is 100211210227. The reversal of 100211210221 is 122012112001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43571970121 + 56639240100 = 208739^2 + 237990^2 .

It is a cyclic number.

It is not a de Polignac number, because 100211210221 - 2²⁵ = 100177655789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100211210227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47764066 + ... + 47766163.

It is an arithmetic number, because the mean of its divisors is an integer number (25076685375).

Almost surely, 2^100211210221 is an apocalyptic number.

It is an amenable number.

100211210221 is a deficient number, since it is larger than the sum of its proper divisors (95531279).

100211210221 is an equidigital number, since it uses as much as digits as its factorization.

100211210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95531278.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100211210221 its reverse (122012112001), we get a palindrome (222223322222).

The spelling of 100211210221 in words is "one hundred billion, two hundred eleven million, two hundred ten thousand, two hundred twenty-one".