211134044231 has 4 divisors (see below), whose sum is σ = 230328048264. Its totient is φ = 191940040200.

The previous prime is 211134044227. The next prime is 211134044249. The reversal of 211134044231 is 132440431112.

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 211134044231 - 2² = 211134044227 is a prime.

It is a super-2 number, since 2×211134044231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211134044231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211134044531) 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, 9597002000 + ... + 9597002021.

It is an arithmetic number, because the mean of its divisors is an integer number (57582012066).

Almost surely, 2^211134044231 is an apocalyptic number.

211134044231 is a deficient number, since it is larger than the sum of its proper divisors (19194004033).

211134044231 is a wasteful number, since it uses less digits than its factorization.

211134044231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19194004032.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 211134044231 its reverse (132440431112), we get a palindrome (343574475343).

The spelling of 211134044231 in words is "two hundred eleven billion, one hundred thirty-four million, forty-four thousand, two hundred thirty-one".