21431104201 has 8 divisors (see below), whose sum is σ = 23113953800. Its totient is φ = 19753155072.

The previous prime is 21431104187. The next prime is 21431104217. The reversal of 21431104201 is 10240113412.

It can be written as a sum of positive squares in 4 ways, for example, as 4753964601 + 16677139600 = 68949^2 + 129140^2 .

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 21431104201 - 2²¹ = 21429007049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21431104501) 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 7 ways as a sum of consecutive naturals, for example, 1216026 + ... + 1233523.

It is an arithmetic number, because the mean of its divisors is an integer number (2889244225).

Almost surely, 2^21431104201 is an apocalyptic number.

It is an amenable number.

21431104201 is a deficient number, since it is larger than the sum of its proper divisors (1682849599).

21431104201 is a wasteful number, since it uses less digits than its factorization.

21431104201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450235.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21431104201 its reverse (10240113412), we get a palindrome (31671217613).

The spelling of 21431104201 in words is "twenty-one billion, four hundred thirty-one million, one hundred four thousand, two hundred one".