21134040001 has 4 divisors (see below), whose sum is σ = 21159230400. Its totient is φ = 21108849604.

The previous prime is 21134039999. The next prime is 21134040007. The reversal of 21134040001 is 10004043112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21134040001 - 2¹ = 21134039999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134040007) 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, 12593941 + ... + 12595618.

It is an arithmetic number, because the mean of its divisors is an integer number (5289807600).

Almost surely, 2^21134040001 is an apocalyptic number.

It is an amenable number.

21134040001 is a deficient number, since it is larger than the sum of its proper divisors (25190399).

21134040001 is an equidigital number, since it uses as much as digits as its factorization.

21134040001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25190398.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21134040001 its reverse (10004043112), we get a palindrome (31138083113).

The spelling of 21134040001 in words is "twenty-one billion, one hundred thirty-four million, forty thousand, one".