201000122210021 has 2 divisors, whose sum is σ = 201000122210022. Its totient is φ = 201000122210020.

The previous prime is 201000122209973. The next prime is 201000122210057. The reversal of 201000122210021 is 120012221000102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199137677908225 + 1862444301796 = 14111615^2 + 1364714^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000122210021 - 2¹⁰ = 201000122208997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201000122209978 and 201000122210005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201000122210821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500061105010 + 100500061105011.

It is an arithmetic number, because the mean of its divisors is an integer number (100500061105011).

Almost surely, 2^{201000122210021} is an apocalyptic number.

It is an amenable number.

201000122210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201000122210021 is an equidigital number, since it uses as much as digits as its factorization.

201000122210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201000122210021 its reverse (120012221000102), we get a palindrome (321012343210123).

The spelling of 201000122210021 in words is "two hundred one trillion, one hundred twenty-two million, two hundred ten thousand, twenty-one".