21134240211 has 8 divisors (see below), whose sum is σ = 32204556544. Its totient is φ = 12076708680.

The previous prime is 21134240201. The next prime is 21134240213. The reversal of 21134240211 is 11204243112.

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

It is not a de Polignac number, because 21134240211 - 2⁹ = 21134239699 is a prime.

It is a super-2 number, since 2×21134240211² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1006392391 = 21134240211 / (2 + 1 + 1 + 3 + 4 + 2 + 4 + 0 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134240213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503196175 + ... + 503196216.

It is an arithmetic number, because the mean of its divisors is an integer number (4025569568).

Almost surely, 2^21134240211 is an apocalyptic number.

21134240211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21134240211 is a deficient number, since it is larger than the sum of its proper divisors (11070316333).

21134240211 is a wasteful number, since it uses less digits than its factorization.

21134240211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006392401.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21134240211 its reverse (11204243112), we get a palindrome (32338483323).

The spelling of 21134240211 in words is "twenty-one billion, one hundred thirty-four million, two hundred forty thousand, two hundred eleven".