200121111121211 has 16 divisors (see below), whose sum is σ = 231131455532544. Its totient is φ = 169717146511104.

The previous prime is 200121111121177. The next prime is 200121111121279. The reversal of 200121111121211 is 112121111121002.

It is a cyclic number.

It is not a de Polignac number, because 200121111121211 - 2¹⁸ = 200121110859067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200121111121211.

It is not an unprimeable number, because it can be changed into a prime (200121111121291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38214725 + ... + 43134758.

It is an arithmetic number, because the mean of its divisors is an integer number (14445715970784).

Almost surely, 2^{200121111121211} is an apocalyptic number.

200121111121211 is a deficient number, since it is larger than the sum of its proper divisors (31010344411333).

200121111121211 is an equidigital number, since it uses as much as digits as its factorization.

200121111121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81353210.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 200121111121211 its reverse (112121111121002), we get a palindrome (312242222242213).

The spelling of 200121111121211 in words is "two hundred trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".