21234340001 has 16 divisors (see below), whose sum is σ = 24475219200. Its totient is φ = 18045758400.

The previous prime is 21234339989. The next prime is 21234340013. The reversal of 21234340001 is 10004343212.

It is an interprime number because it is at equal distance from previous prime (21234339989) and next prime (21234340013).

It is a cyclic number.

It is not a de Polignac number, because 21234340001 - 2²² = 21230145697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21234340021) 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, 562676 + ... + 599226.

It is an arithmetic number, because the mean of its divisors is an integer number (1529701200).

Almost surely, 2^21234340001 is an apocalyptic number.

It is an amenable number.

21234340001 is a deficient number, since it is larger than the sum of its proper divisors (3240879199).

21234340001 is a wasteful number, since it uses less digits than its factorization.

21234340001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37264.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21234340001 its reverse (10004343212), we get a palindrome (31238683213).

The spelling of 21234340001 in words is "twenty-one billion, two hundred thirty-four million, three hundred forty thousand, one".