2211112200221 has 4 divisors (see below), whose sum is σ = 2223893195772. Its totient is φ = 2198331204672.

The previous prime is 2211112200181. The next prime is 2211112200229. The reversal of 2211112200221 is 1220022111122.

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 1190032264996 + 1021079935225 = 1090886^2 + 1010485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211112200221 - 2²⁶ = 2211045091357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2211112200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211112200229) 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, 6390497516 + ... + 6390497861.

It is an arithmetic number, because the mean of its divisors is an integer number (555973298943).

Almost surely, 2^{2211112200221} is an apocalyptic number.

It is an amenable number.

2211112200221 is a deficient number, since it is larger than the sum of its proper divisors (12780995551).

2211112200221 is a wasteful number, since it uses less digits than its factorization.

2211112200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12780995550.

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

Adding to 2211112200221 its reverse (1220022111122), we get a palindrome (3431134311343).

The spelling of 2211112200221 in words is "two trillion, two hundred eleven billion, one hundred twelve million, two hundred thousand, two hundred twenty-one".