21431131301 has 4 divisors (see below), whose sum is σ = 22559085600. Its totient is φ = 20303177004.

The previous prime is 21431131259. The next prime is 21431131303. The reversal of 21431131301 is 10313113412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21431131301 - 2⁶ = 21431131237 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 (21431131303) 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 3 ways as a sum of consecutive naturals, for example, 563977121 + ... + 563977158.

It is an arithmetic number, because the mean of its divisors is an integer number (5639771400).

Almost surely, 2^21431131301 is an apocalyptic number.

It is an amenable number.

21431131301 is a deficient number, since it is larger than the sum of its proper divisors (1127954299).

21431131301 is a wasteful number, since it uses less digits than its factorization.

21431131301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127954298.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21431131301 its reverse (10313113412), we get a palindrome (31744244713).

The spelling of 21431131301 in words is "twenty-one billion, four hundred thirty-one million, one hundred thirty-one thousand, three hundred one".