200111022212221 has 4 divisors (see below), whose sum is σ = 200132173370844. Its totient is φ = 200089871053600.

The previous prime is 200111022212197. The next prime is 200111022212261. The reversal of 200111022212221 is 122212220111002.

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 157428463702500 + 42682558509721 = 12547050^2 + 6533189^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111022212221 - 2¹⁷ = 200111022081149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111022212261) 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, 10575565120 + ... + 10575584041.

It is an arithmetic number, because the mean of its divisors is an integer number (50033043342711).

Almost surely, 2^{200111022212221} is an apocalyptic number.

It is an amenable number.

200111022212221 is a deficient number, since it is larger than the sum of its proper divisors (21151158623).

200111022212221 is an equidigital number, since it uses as much as digits as its factorization.

200111022212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21151158622.

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

Adding to 200111022212221 its reverse (122212220111002), we get a palindrome (322323242323223).

The spelling of 200111022212221 in words is "two hundred trillion, one hundred eleven billion, twenty-two million, two hundred twelve thousand, two hundred twenty-one".