211010100221 has 4 divisors (see below), whose sum is σ = 211247992992. Its totient is φ = 210772207452.

The previous prime is 211010100187. The next prime is 211010100241. The reversal of 211010100221 is 122001010112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211010100221 - 2⁶ = 211010100157 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 (211010100241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118945055 + ... + 118946828.

It is an arithmetic number, because the mean of its divisors is an integer number (52811998248).

Almost surely, 2^211010100221 is an apocalyptic number.

It is an amenable number.

211010100221 is a deficient number, since it is larger than the sum of its proper divisors (237892771).

211010100221 is an equidigital number, since it uses as much as digits as its factorization.

211010100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237892770.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211010100221 its reverse (122001010112), we get a palindrome (333011110333).

The spelling of 211010100221 in words is "two hundred eleven billion, ten million, one hundred thousand, two hundred twenty-one".