200011121221 has 4 divisors (see below), whose sum is σ = 200012041152. Its totient is φ = 200010201292.

The previous prime is 200011121203. The next prime is 200011121227. The reversal of 200011121221 is 122121110002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 200011121221 - 2¹¹ = 200011119173 is a prime.

It is a super-2 number, since 2×200011121221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200011121227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68730 + ... + 636196.

It is an arithmetic number, because the mean of its divisors is an integer number (50003010288).

Almost surely, 2^200011121221 is an apocalyptic number.

It is an amenable number.

200011121221 is a deficient number, since it is larger than the sum of its proper divisors (919931).

200011121221 is an equidigital number, since it uses as much as digits as its factorization.

200011121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919930.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200011121221 its reverse (122121110002), we get a palindrome (322132231223).

The spelling of 200011121221 in words is "two hundred billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".