201123001311 has 32 divisors (see below), whose sum is σ = 292706680320. Its totient is φ = 122356399104.

The previous prime is 201123001307. The next prime is 201123001319. The reversal of 201123001311 is 113100321102.

It is a happy number.

It is not a de Polignac number, because 201123001311 - 2² = 201123001307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201123001319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238155 + ... + 677468.

It is an arithmetic number, because the mean of its divisors is an integer number (9147083760).

Almost surely, 2^201123001311 is an apocalyptic number.

201123001311 is a deficient number, since it is larger than the sum of its proper divisors (91583679009).

201123001311 is a wasteful number, since it uses less digits than its factorization.

201123001311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915775.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 201123001311 its reverse (113100321102), we get a palindrome (314223322413).

The spelling of 201123001311 in words is "two hundred one billion, one hundred twenty-three million, one thousand, three hundred eleven".