21134403311 has 8 divisors (see below), whose sum is σ = 24155352864. Its totient is φ = 18113891040.

The previous prime is 21134403299. The next prime is 21134403397. The reversal of 21134403311 is 11330443112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21134403311 - 2¹⁸ = 21134141167 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 (21134403011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1781 + ... + 205601.

It is an arithmetic number, because the mean of its divisors is an integer number (3019419108).

Almost surely, 2^21134403311 is an apocalyptic number.

21134403311 is a deficient number, since it is larger than the sum of its proper divisors (3020949553).

21134403311 is a wasteful number, since it uses less digits than its factorization.

21134403311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218641.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21134403311 its reverse (11330443112), we get a palindrome (32464846423).

The spelling of 21134403311 in words is "twenty-one billion, one hundred thirty-four million, four hundred three thousand, three hundred eleven".