211405142311 has 4 divisors (see below), whose sum is σ = 230623791624. Its totient is φ = 192186493000.

The previous prime is 211405142309. The next prime is 211405142339. The reversal of 211405142311 is 113241504112.

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 211405142311 - 2¹ = 211405142309 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 (211405142111) 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, 9609324640 + ... + 9609324661.

It is an arithmetic number, because the mean of its divisors is an integer number (57655947906).

Almost surely, 2^211405142311 is an apocalyptic number.

211405142311 is a deficient number, since it is larger than the sum of its proper divisors (19218649313).

211405142311 is a wasteful number, since it uses less digits than its factorization.

211405142311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19218649312.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 211405142311 its reverse (113241504112), we get a palindrome (324646646423).

The spelling of 211405142311 in words is "two hundred eleven billion, four hundred five million, one hundred forty-two thousand, three hundred eleven".