200211121121221 has 4 divisors (see below), whose sum is σ = 228812709852832. Its totient is φ = 171609532389612.

The previous prime is 200211121121147. The next prime is 200211121121243. The reversal of 200211121121221 is 122121121112002.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200211121121221 is a prime.

It is a super-2 number, since 2×200211121121221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200211121121821) 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, 14300794365795 + ... + 14300794365808.

It is an arithmetic number, because the mean of its divisors is an integer number (57203177463208).

Almost surely, 2^{200211121121221} is an apocalyptic number.

It is an amenable number.

200211121121221 is a deficient number, since it is larger than the sum of its proper divisors (28601588731611).

200211121121221 is an equidigital number, since it uses as much as digits as its factorization.

200211121121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28601588731610.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 200211121121221 its reverse (122121121112002), we get a palindrome (322332242233223).

The spelling of 200211121121221 in words is "two hundred trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".