200211021111221 has 2 divisors, whose sum is σ = 200211021111222. Its totient is φ = 200211021111220.

The previous prime is 200211021111217. The next prime is 200211021111229. The reversal of 200211021111221 is 122111120112002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199057136955121 + 1153884156100 = 14108761^2 + 1074190^2 .

It is a cyclic number.

It is not a de Polignac number, because 200211021111221 - 2² = 200211021111217 is a prime.

It is a super-2 number, since 2×200211021111221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200211021111221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200211021111229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100105510555610 + 100105510555611.

It is an arithmetic number, because the mean of its divisors is an integer number (100105510555611).

Almost surely, 2^{200211021111221} is an apocalyptic number.

It is an amenable number.

200211021111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200211021111221 is an equidigital number, since it uses as much as digits as its factorization.

200211021111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 200211021111221 its reverse (122111120112002), we get a palindrome (322322141223223).

The spelling of 200211021111221 in words is "two hundred trillion, two hundred eleven billion, twenty-one million, one hundred eleven thousand, two hundred twenty-one".