201021311311 has 4 divisors (see below), whose sum is σ = 201024448272. Its totient is φ = 201018174352.

The previous prime is 201021311303. The next prime is 201021311321. The reversal of 201021311311 is 113113120102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201021311311 - 2³ = 201021311303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021311321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1470310 + ... + 1601203.

It is an arithmetic number, because the mean of its divisors is an integer number (50256112068).

Almost surely, 2^201021311311 is an apocalyptic number.

201021311311 is a deficient number, since it is larger than the sum of its proper divisors (3136961).

201021311311 is an equidigital number, since it uses as much as digits as its factorization.

201021311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136960.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 201021311311 its reverse (113113120102), we get a palindrome (314134431413).

The spelling of 201021311311 in words is "two hundred one billion, twenty-one million, three hundred eleven thousand, three hundred eleven".