21424012001 has 8 divisors (see below), whose sum is σ = 25773247680. Its totient is φ = 17396941968.

The previous prime is 21424011997. The next prime is 21424012003. The reversal of 21424012001 is 10021042412.

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

It is not a de Polignac number, because 21424012001 - 2² = 21424011997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21424012003) 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, 80541266 + ... + 80541531.

It is an arithmetic number, because the mean of its divisors is an integer number (3221655960).

Almost surely, 2^21424012001 is an apocalyptic number.

It is an amenable number.

21424012001 is a deficient number, since it is larger than the sum of its proper divisors (4349235679).

21424012001 is a wasteful number, since it uses less digits than its factorization.

21424012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161082823.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21424012001 its reverse (10021042412), we get a palindrome (31445054413).

The spelling of 21424012001 in words is "twenty-one billion, four hundred twenty-four million, twelve thousand, one".