210122122020401 has 2 divisors, whose sum is σ = 210122122020402. Its totient is φ = 210122122020400.

The previous prime is 210122122020383. The next prime is 210122122020463. The reversal of 210122122020401 is 104020221221012.

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., 202287357146176 + 7834764874225 = 14222776^2 + 2799065^2 .

It is a cyclic number.

It is not a de Polignac number, because 210122122020401 - 2²² = 210122117826097 is a prime.

It is not a weakly prime, because it can be changed into another prime (210122122020491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061061010200 + 105061061010201.

It is an arithmetic number, because the mean of its divisors is an integer number (105061061010201).

Almost surely, 2^{210122122020401} is an apocalyptic number.

It is an amenable number.

210122122020401 is a deficient number, since it is larger than the sum of its proper divisors (1).

210122122020401 is an equidigital number, since it uses as much as digits as its factorization.

210122122020401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 210122122020401 its reverse (104020221221012), we get a palindrome (314142343241413).

The spelling of 210122122020401 in words is "two hundred ten trillion, one hundred twenty-two billion, one hundred twenty-two million, twenty thousand, four hundred one".