21001424101 has 8 divisors (see below), whose sum is σ = 24395097344. Its totient is φ = 17706118320.

The previous prime is 21001424089. The next prime is 21001424107. The reversal of 21001424101 is 10142410012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21001424101 - 2³¹ = 18853940453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001424107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24591405 + ... + 24592258.

It is an arithmetic number, because the mean of its divisors is an integer number (3049387168).

Almost surely, 2^21001424101 is an apocalyptic number.

It is an amenable number.

21001424101 is a deficient number, since it is larger than the sum of its proper divisors (3393673243).

21001424101 is an equidigital number, since it uses as much as digits as its factorization.

21001424101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49183731.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21001424101 its reverse (10142410012), we get a palindrome (31143834113).

The spelling of 21001424101 in words is "twenty-one billion, one million, four hundred twenty-four thousand, one hundred one".