21344231371 has 2 divisors, whose sum is σ = 21344231372. Its totient is φ = 21344231370.

The previous prime is 21344231351. The next prime is 21344231407. The reversal of 21344231371 is 17313244312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21344231371 - 2¹³ = 21344223179 is a prime.

It is not a weakly prime, because it can be changed into another prime (21344231351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672115685 + 10672115686.

It is an arithmetic number, because the mean of its divisors is an integer number (10672115686).

Almost surely, 2^21344231371 is an apocalyptic number.

21344231371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344231371 is an equidigital number, since it uses as much as digits as its factorization.

21344231371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

Adding to 21344231371 its reverse (17313244312), we get a palindrome (38657475683).

The spelling of 21344231371 in words is "twenty-one billion, three hundred forty-four million, two hundred thirty-one thousand, three hundred seventy-one".