200121111102111 has 4 divisors (see below), whose sum is σ = 266828148136152. Its totient is φ = 133414074068072.

The previous prime is 200121111102109. The next prime is 200121111102113. The reversal of 200121111102111 is 111201111121002.

200121111102111 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (200121111102109) and next prime (200121111102113).

It is a cyclic number.

It is not a de Polignac number, because 200121111102111 - 2¹ = 200121111102109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121111102113) 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, 33353518517016 + ... + 33353518517021.

It is an arithmetic number, because the mean of its divisors is an integer number (66707037034038).

Almost surely, 2^{200121111102111} is an apocalyptic number.

200121111102111 is a deficient number, since it is larger than the sum of its proper divisors (66707037034041).

200121111102111 is an equidigital number, since it uses as much as digits as its factorization.

200121111102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66707037034040.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 200121111102111 its reverse (111201111121002), we get a palindrome (311322222223113).

The spelling of 200121111102111 in words is "two hundred trillion, one hundred twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred eleven".