211404004001 has 4 divisors (see below), whose sum is σ = 211730749632. Its totient is φ = 211077258372.

The previous prime is 211404003997. The next prime is 211404004003. The reversal of 211404004001 is 100400404112.

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.

It is a cyclic number.

It is not a de Polignac number, because 211404004001 - 2² = 211404003997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211404004003) 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, 163371845 + ... + 163373138.

It is an arithmetic number, because the mean of its divisors is an integer number (52932687408).

Almost surely, 2^211404004001 is an apocalyptic number.

It is an amenable number.

211404004001 is a deficient number, since it is larger than the sum of its proper divisors (326745631).

211404004001 is an equidigital number, since it uses as much as digits as its factorization.

211404004001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326745630.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 211404004001 its reverse (100400404112), we get a palindrome (311804408113).

The spelling of 211404004001 in words is "two hundred eleven billion, four hundred four million, four thousand, one".