211220112202221 has 16 divisors (see below), whose sum is σ = 293871901478400. Its totient is φ = 134690883906480.

The previous prime is 211220112202193. The next prime is 211220112202271. The reversal of 211220112202221 is 122202211022112.

It is not a de Polignac number, because 211220112202221 - 2¹⁵ = 211220112169453 is a prime.

It is a super-2 number, since 2×211220112202221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220112202271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53907586 + ... + 57692876.

It is an arithmetic number, because the mean of its divisors is an integer number (18366993842400).

Almost surely, 2^{211220112202221} is an apocalyptic number.

It is an amenable number.

211220112202221 is a deficient number, since it is larger than the sum of its proper divisors (82651789276179).

211220112202221 is a wasteful number, since it uses less digits than its factorization.

211220112202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4594016.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211220112202221 its reverse (122202211022112), we get a palindrome (333422323224333).

The spelling of 211220112202221 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred twelve million, two hundred two thousand, two hundred twenty-one".