201021120511 has 2 divisors, whose sum is σ = 201021120512. Its totient is φ = 201021120510.

The previous prime is 201021120427. The next prime is 201021120557. The reversal of 201021120511 is 115021120102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201021120511 - 2¹⁷ = 201020989439 is a prime.

It is a super-2 number, since 2×201021120511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201021120211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510560255 + 100510560256.

It is an arithmetic number, because the mean of its divisors is an integer number (100510560256).

Almost surely, 2^201021120511 is an apocalyptic number.

201021120511 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021120511 is an equidigital number, since it uses as much as digits as its factorization.

201021120511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 201021120511 its reverse (115021120102), we get a palindrome (316042240613).

The spelling of 201021120511 in words is "two hundred one billion, twenty-one million, one hundred twenty thousand, five hundred eleven".