211122210110221 has 4 divisors (see below), whose sum is σ = 222233905379200. Its totient is φ = 200010514841244.

The previous prime is 211122210110191. The next prime is 211122210110281. The reversal of 211122210110221 is 122011012221112.

It is a happy number.

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 211122210110221 - 2⁷ = 211122210110093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 11111695268959 = 211122210110221 / (2 + 1 + 1 + 1 + 2 + 2 + 2 + 1 + 0 + 1 + 1 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122210110281) 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, 5555847634461 + ... + 5555847634498.

It is an arithmetic number, because the mean of its divisors is an integer number (55558476344800).

Almost surely, 2^{211122210110221} is an apocalyptic number.

It is an amenable number.

211122210110221 is a deficient number, since it is larger than the sum of its proper divisors (11111695268979).

211122210110221 is a wasteful number, since it uses less digits than its factorization.

211122210110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111695268978.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211122210110221 its reverse (122011012221112), we get a palindrome (333133222331333).

The spelling of 211122210110221 in words is "two hundred eleven trillion, one hundred twenty-two billion, two hundred ten million, one hundred ten thousand, two hundred twenty-one".