211102002212021 has 4 divisors (see below), whose sum is σ = 211181453476332. Its totient is φ = 211022550947712.

The previous prime is 211102002211927. The next prime is 211102002212029. The reversal of 211102002212021 is 120212200201112.

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 157595132616100 + 53506869595921 = 12553690^2 + 7314839^2 .

It is a cyclic number.

It is not a de Polignac number, because 211102002212021 - 2³⁰ = 211100928470197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102002212029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39725628170 + ... + 39725633483.

It is an arithmetic number, because the mean of its divisors is an integer number (52795363369083).

Almost surely, 2^{211102002212021} is an apocalyptic number.

It is an amenable number.

211102002212021 is a deficient number, since it is larger than the sum of its proper divisors (79451264311).

211102002212021 is an equidigital number, since it uses as much as digits as its factorization.

211102002212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79451264310.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211102002212021 its reverse (120212200201112), we get a palindrome (331314202413133).

The spelling of 211102002212021 in words is "two hundred eleven trillion, one hundred two billion, two million, two hundred twelve thousand, twenty-one".