200111220209921 has 2 divisors, whose sum is σ = 200111220209922. Its totient is φ = 200111220209920.

The previous prime is 200111220209893. The next prime is 200111220210043. The reversal of 200111220209921 is 129902022111002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169923217411600 + 30188002798321 = 13035460^2 + 5494361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200111220209921 is a prime.

It is not a weakly prime, because it can be changed into another prime (200111220205921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100055610104960 + 100055610104961.

It is an arithmetic number, because the mean of its divisors is an integer number (100055610104961).

Almost surely, 2^{200111220209921} is an apocalyptic number.

It is an amenable number.

200111220209921 is a deficient number, since it is larger than the sum of its proper divisors (1).

200111220209921 is an equidigital number, since it uses as much as digits as its factorization.

200111220209921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 200111220209921 in words is "two hundred trillion, one hundred eleven billion, two hundred twenty million, two hundred nine thousand, nine hundred twenty-one".