21134434001 has 4 divisors (see below), whose sum is σ = 21139421604. Its totient is φ = 21129446400.

The previous prime is 21134433979. The next prime is 21134434007. The reversal of 21134434001 is 10043443112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15519179776 + 5615254225 = 124576^2 + 74935^2 .

It is a cyclic number.

It is not a de Polignac number, because 21134434001 - 2³⁰ = 20060692177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134434007) 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, 2487440 + ... + 2495921.

It is an arithmetic number, because the mean of its divisors is an integer number (5284855401).

Almost surely, 2^21134434001 is an apocalyptic number.

It is an amenable number.

21134434001 is a deficient number, since it is larger than the sum of its proper divisors (4987603).

21134434001 is an equidigital number, since it uses as much as digits as its factorization.

21134434001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987602.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21134434001 its reverse (10043443112), we get a palindrome (31177877113).

The spelling of 21134434001 in words is "twenty-one billion, one hundred thirty-four million, four hundred thirty-four thousand, one".