21241413401 has 4 divisors (see below), whose sum is σ = 22875368292. Its totient is φ = 19607458512.

The previous prime is 21241413377. The next prime is 21241413421. The reversal of 21241413401 is 10431414212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2894440000 + 18346973401 = 53800^2 + 135451^2 .

It is a cyclic number.

It is not a de Polignac number, because 21241413401 - 2¹⁰ = 21241412377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21241413421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816977426 + ... + 816977451.

It is an arithmetic number, because the mean of its divisors is an integer number (5718842073).

Almost surely, 2^21241413401 is an apocalyptic number.

It is an amenable number.

21241413401 is a deficient number, since it is larger than the sum of its proper divisors (1633954891).

21241413401 is a wasteful number, since it uses less digits than its factorization.

21241413401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633954890.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21241413401 its reverse (10431414212), we get a palindrome (31672827613).

The spelling of 21241413401 in words is "twenty-one billion, two hundred forty-one million, four hundred thirteen thousand, four hundred one".