21402341231 has 8 divisors (see below), whose sum is σ = 21501225360. Its totient is φ = 21303652032.

The previous prime is 21402341203. The next prime is 21402341291. The reversal of 21402341231 is 13214320412.

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 21402341231 - 2¹⁴ = 21402324847 is a prime.

It is a super-2 number, since 2×21402341231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21402341197 and 21402341206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402341201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173696 + ... + 270138.

It is an arithmetic number, because the mean of its divisors is an integer number (2687653170).

Almost surely, 2^21402341231 is an apocalyptic number.

21402341231 is a deficient number, since it is larger than the sum of its proper divisors (98884129).

21402341231 is an equidigital number, since it uses as much as digits as its factorization.

21402341231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97465.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21402341231 its reverse (13214320412), we get a palindrome (34616661643).

The spelling of 21402341231 in words is "twenty-one billion, four hundred two million, three hundred forty-one thousand, two hundred thirty-one".