201021210021133 has 2 divisors, whose sum is σ = 201021210021134. Its totient is φ = 201021210021132.

The previous prime is 201021210021103. The next prime is 201021210021179. The reversal of 201021210021133 is 331120012120102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181506046766724 + 19515163254409 = 13472418^2 + 4417597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201021210021133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201021210021133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201021210021103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510605010566 + 100510605010567.

It is an arithmetic number, because the mean of its divisors is an integer number (100510605010567).

Almost surely, 2^{201021210021133} is an apocalyptic number.

It is an amenable number.

201021210021133 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021210021133 is an equidigital number, since it uses as much as digits as its factorization.

201021210021133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 201021210021133 its reverse (331120012120102), we get a palindrome (532141222141235).

The spelling of 201021210021133 in words is "two hundred one trillion, twenty-one billion, two hundred ten million, twenty-one thousand, one hundred thirty-three".