21134011 has 16 divisors (see below), whose sum is σ = 22644000. Its totient is φ = 19692288.

The previous prime is 21133979. The next prime is 21134021. The reversal of 21134011 is 11043112.

It is a cyclic number.

It is not a de Polignac number, because 21134011 - 2⁵ = 21133979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21133982 and 21134000.

It is not an unprimeable number, because it can be changed into a prime (21134021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141765 + ... + 141913.

It is an arithmetic number, because the mean of its divisors is an integer number (1415250).

Almost surely, 2^21134011 is an apocalyptic number.

21134011 is a deficient number, since it is larger than the sum of its proper divisors (1509989).

21134011 is a wasteful number, since it uses less digits than its factorization.

21134011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21134011 is about 4597.1742407701. The cubic root of 21134011 is about 276.4780406507.

Adding to 21134011 its reverse (11043112), we get a palindrome (32177123).

The spelling of 21134011 in words is "twenty-one million, one hundred thirty-four thousand, eleven".