21442331401 has 8 divisors (see below), whose sum is σ = 21472819200. Its totient is φ = 21411867600.

The previous prime is 21442331381. The next prime is 21442331437. The reversal of 21442331401 is 10413324412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21442331401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442331461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2426970 + ... + 2435788.

It is an arithmetic number, because the mean of its divisors is an integer number (2684102400).

Almost surely, 2^21442331401 is an apocalyptic number.

It is an amenable number.

21442331401 is a deficient number, since it is larger than the sum of its proper divisors (30487799).

21442331401 is a wasteful number, since it uses less digits than its factorization.

21442331401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11999.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21442331401 its reverse (10413324412), we get a palindrome (31855655813).

The spelling of 21442331401 in words is "twenty-one billion, four hundred forty-two million, three hundred thirty-one thousand, four hundred one".