200121222111 has 4 divisors (see below), whose sum is σ = 266828296152. Its totient is φ = 133414148072.

The previous prime is 200121222101. The next prime is 200121222131. The reversal of 200121222111 is 111222121002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 200121222111 - 2⁵ = 200121222079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121222101) 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, 33353537016 + ... + 33353537021.

It is an arithmetic number, because the mean of its divisors is an integer number (66707074038).

Almost surely, 2^200121222111 is an apocalyptic number.

200121222111 is a deficient number, since it is larger than the sum of its proper divisors (66707074041).

200121222111 is an equidigital number, since it uses as much as digits as its factorization.

200121222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66707074040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 200121222111 its reverse (111222121002), we get a palindrome (311343343113).

The spelling of 200121222111 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".