200211122112121 has 2 divisors, whose sum is σ = 200211122112122. Its totient is φ = 200211122112120.

The previous prime is 200211122112119. The next prime is 200211122112139. The reversal of 200211122112121 is 121211221112002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199435516042896 + 775606069225 = 14122164^2 + 880685^2 .

It is a cyclic number.

It is not a de Polignac number, because 200211122112121 - 2¹ = 200211122112119 is a prime.

Together with 200211122112119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (200211122112151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100105561056060 + 100105561056061.

It is an arithmetic number, because the mean of its divisors is an integer number (100105561056061).

Almost surely, 2^{200211122112121} is an apocalyptic number.

It is an amenable number.

200211122112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200211122112121 is an equidigital number, since it uses as much as digits as its factorization.

200211122112121 is an evil number, because the sum of its binary digits is even.

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

Adding to 200211122112121 its reverse (121211221112002), we get a palindrome (321422343224123).

The spelling of 200211122112121 in words is "two hundred trillion, two hundred eleven billion, one hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".