200122221020081 has 2 divisors, whose sum is σ = 200122221020082. Its totient is φ = 200122221020080.

The previous prime is 200122221020077. The next prime is 200122221020143. The reversal of 200122221020081 is 180020122221002.

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., 195978720577600 + 4143500442481 = 13999240^2 + 2035559^2 .

It is a cyclic number.

It is not a de Polignac number, because 200122221020081 - 2² = 200122221020077 is a prime.

It is a super-2 number, since 2×200122221020081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (200122221025081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100061110510040 + 100061110510041.

It is an arithmetic number, because the mean of its divisors is an integer number (100061110510041).

Almost surely, 2^{200122221020081} is an apocalyptic number.

It is an amenable number.

200122221020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

200122221020081 is an equidigital number, since it uses as much as digits as its factorization.

200122221020081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 200122221020081 its reverse (180020122221002), we get a palindrome (380142343241083).

The spelling of 200122221020081 in words is "two hundred trillion, one hundred twenty-two billion, two hundred twenty-one million, twenty thousand, eighty-one".