200121101221111 has 32 divisors (see below), whose sum is σ = 231288300896256. Its totient is φ = 169605881088000.

The previous prime is 200121101221033. The next prime is 200121101221127. The reversal of 200121101221111 is 111122101121002.

It is not a de Polignac number, because 200121101221111 - 2¹³ = 200121101212919 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 (200121101221141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7664231946 + ... + 7664258056.

It is an arithmetic number, because the mean of its divisors is an integer number (7227759403008).

Almost surely, 2^{200121101221111} is an apocalyptic number.

200121101221111 is a deficient number, since it is larger than the sum of its proper divisors (31167199675145).

200121101221111 is a wasteful number, since it uses less digits than its factorization.

200121101221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49143.

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

Adding to 200121101221111 its reverse (111122101121002), we get a palindrome (311243202342113).

The spelling of 200121101221111 in words is "two hundred trillion, one hundred twenty-one billion, one hundred one million, two hundred twenty-one thousand, one hundred eleven".