21234112401 has 8 divisors (see below), whose sum is σ = 28312919104. Its totient is φ = 14155690320.

The previous prime is 21234112399. The next prime is 21234112409. The reversal of 21234112401 is 10421143212.

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

It is not a de Polignac number, because 21234112401 - 2¹ = 21234112399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21234112409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77436 + ... + 220146.

It is an arithmetic number, because the mean of its divisors is an integer number (3539114888).

Almost surely, 2^21234112401 is an apocalyptic number.

It is an amenable number.

21234112401 is a deficient number, since it is larger than the sum of its proper divisors (7078806703).

21234112401 is a wasteful number, since it uses less digits than its factorization.

21234112401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192311.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21234112401 its reverse (10421143212), we get a palindrome (31655255613).

The spelling of 21234112401 in words is "twenty-one billion, two hundred thirty-four million, one hundred twelve thousand, four hundred one".