211100122202221 has 48 divisors (see below), whose sum is σ = 250342686720000. Its totient is φ = 177438472979040.

The previous prime is 211100122202149. The next prime is 211100122202323. The reversal of 211100122202221 is 122202221001112.

It is a de Polignac number, because none of the positive numbers 2^k-211100122202221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100122205221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2214808156 + ... + 2214903466.

It is an arithmetic number, because the mean of its divisors is an integer number (5215472640000).

Almost surely, 2^{211100122202221} is an apocalyptic number.

It is an amenable number.

211100122202221 is a deficient number, since it is larger than the sum of its proper divisors (39242564517779).

211100122202221 is a wasteful number, since it uses less digits than its factorization.

211100122202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97262 (or 97255 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211100122202221 its reverse (122202221001112), we get a palindrome (333302343203333).

The spelling of 211100122202221 in words is "two hundred eleven trillion, one hundred billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-one".