201311401 has 4 divisors (see below), whose sum is σ = 201339792. Its totient is φ = 201283012.

The previous prime is 201311393. The next prime is 201311419. The reversal of 201311401 is 104113102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 104113102 = 2 ⋅52056551.

It is a cyclic number.

It is not a de Polignac number, because 201311401 - 2³ = 201311393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201311471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450 + ... + 21076.

It is an arithmetic number, because the mean of its divisors is an integer number (50334948).

Almost surely, 2^201311401 is an apocalyptic number.

It is an amenable number.

201311401 is a deficient number, since it is larger than the sum of its proper divisors (28391).

201311401 is a wasteful number, since it uses less digits than its factorization.

201311401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28390.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 201311401 is about 14188.4248949628. The cubic root of 201311401 is about 586.0789506784.

Adding to 201311401 its reverse (104113102), we get a palindrome (305424503).

The spelling of 201311401 in words is "two hundred one million, three hundred eleven thousand, four hundred one".