211002231002221 has 8 divisors (see below), whose sum is σ = 211539102687864. Its totient is φ = 210465986872320.

The previous prime is 211002231002203. The next prime is 211002231002239. The reversal of 211002231002221 is 122200132200112.

It is an interprime number because it is at equal distance from previous prime (211002231002203) and next prime (211002231002239).

It can be written as a sum of positive squares in 4 ways, for example, as 15936175776196 + 195066055226025 = 3992014^2 + 13966605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211002231002221 - 2²⁹ = 211001694131309 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 (211002231002621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156215620 + ... + 157560541.

It is an arithmetic number, because the mean of its divisors is an integer number (26442387835983).

Almost surely, 2^{211002231002221} is an apocalyptic number.

It is an amenable number.

211002231002221 is a deficient number, since it is larger than the sum of its proper divisors (536871685643).

211002231002221 is a wasteful number, since it uses less digits than its factorization.

211002231002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313777871.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 211002231002221 its reverse (122200132200112), we get a palindrome (333202363202333).

The spelling of 211002231002221 in words is "two hundred eleven trillion, two billion, two hundred thirty-one million, two thousand, two hundred twenty-one".