21230002011431 has 4 divisors (see below), whose sum is σ = 21236808684000. Its totient is φ = 21223195338864.

The previous prime is 21230002011403. The next prime is 21230002011437. The reversal of 21230002011431 is 13411020003212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230002011431 is a prime.

It is a super-2 number, since 2×21230002011431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230002011437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3403331606 + ... + 3403337843.

It is an arithmetic number, because the mean of its divisors is an integer number (5309202171000).

Almost surely, 2^{21230002011431} is an apocalyptic number.

21230002011431 is a deficient number, since it is larger than the sum of its proper divisors (6806672569).

21230002011431 is an equidigital number, since it uses as much as digits as its factorization.

21230002011431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6806672568.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21230002011431 its reverse (13411020003212), we get a palindrome (34641022014643).

The spelling of 21230002011431 in words is "twenty-one trillion, two hundred thirty billion, two million, eleven thousand, four hundred thirty-one".