21431412113 has 8 divisors (see below), whose sum is σ = 21517249320. Its totient is φ = 21345621120.

The previous prime is 21431412073. The next prime is 21431412127. The reversal of 21431412113 is 31121413412.

It can be written as a sum of positive squares in 4 ways, for example, as 373919569 + 21057492544 = 19337^2 + 145112^2 .

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 21431412113 - 2⁸ = 21431411857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21431412173) 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, 1146623 + ... + 1165163.

It is an arithmetic number, because the mean of its divisors is an integer number (2689656165).

Almost surely, 2^21431412113 is an apocalyptic number.

It is an amenable number.

21431412113 is a deficient number, since it is larger than the sum of its proper divisors (85837207).

21431412113 is a wasteful number, since it uses less digits than its factorization.

21431412113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23107.

The product of its digits is 576, while the sum is 23.

Adding to 21431412113 its reverse (31121413412), we get a palindrome (52552825525).

The spelling of 21431412113 in words is "twenty-one billion, four hundred thirty-one million, four hundred twelve thousand, one hundred thirteen".