21431101301 has 4 divisors (see below), whose sum is σ = 21463524204. Its totient is φ = 21398678400.

The previous prime is 21431101291. The next prime is 21431101303. The reversal of 21431101301 is 10310113412.

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 6432200401 + 14998900900 = 80201^2 + 122470^2 .

It is a cyclic number.

It is not a de Polignac number, because 21431101301 - 2¹⁰ = 21431100277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21431101301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431101303) 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, 16210460 + ... + 16211781.

It is an arithmetic number, because the mean of its divisors is an integer number (5365881051).

Almost surely, 2^21431101301 is an apocalyptic number.

It is an amenable number.

21431101301 is a deficient number, since it is larger than the sum of its proper divisors (32422903).

21431101301 is an equidigital number, since it uses as much as digits as its factorization.

21431101301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32422902.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21431101301 its reverse (10310113412), we get a palindrome (31741214713).

The spelling of 21431101301 in words is "twenty-one billion, four hundred thirty-one million, one hundred one thousand, three hundred one".