210122110001 has 2 divisors, whose sum is σ = 210122110002. Its totient is φ = 210122110000.

The previous prime is 210122109997. The next prime is 210122110013. The reversal of 210122110001 is 100011221012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206639339776 + 3482770225 = 454576^2 + 59015^2 .

It is a cyclic number.

It is not a de Polignac number, because 210122110001 - 2² = 210122109997 is a prime.

It is a super-2 number, since 2×210122110001² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (210122110901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061055000 + 105061055001.

It is an arithmetic number, because the mean of its divisors is an integer number (105061055001).

Almost surely, 2^210122110001 is an apocalyptic number.

It is an amenable number.

210122110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

210122110001 is an equidigital number, since it uses as much as digits as its factorization.

210122110001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210122110001 its reverse (100011221012), we get a palindrome (310133331013).

The spelling of 210122110001 in words is "two hundred ten billion, one hundred twenty-two million, one hundred ten thousand, one".