211404323401 has 4 divisors (see below), whose sum is σ = 211417762500. Its totient is φ = 211390884304.

The previous prime is 211404323399. The next prime is 211404323411. The reversal of 211404323401 is 104323404112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2756355001 + 208647968400 = 52501^2 + 456780^2 .

It is a cyclic number.

It is not a de Polignac number, because 211404323401 - 2¹ = 211404323399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211404323411) 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, 6695926 + ... + 6727423.

It is an arithmetic number, because the mean of its divisors is an integer number (52854440625).

Almost surely, 2^211404323401 is an apocalyptic number.

It is an amenable number.

211404323401 is a deficient number, since it is larger than the sum of its proper divisors (13439099).

211404323401 is a wasteful number, since it uses less digits than its factorization.

211404323401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13439098.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 211404323401 its reverse (104323404112), we get a palindrome (315727727513).

It can be divided in two parts, 2114043 and 23401, that added together give a square (2137444 = 1462²).

The spelling of 211404323401 in words is "two hundred eleven billion, four hundred four million, three hundred twenty-three thousand, four hundred one".