21301139323 has 2 divisors, whose sum is σ = 21301139324. Its totient is φ = 21301139322.

The previous prime is 21301139273. The next prime is 21301139359. The reversal of 21301139323 is 32393110312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21301139323 - 2³³ = 12711204731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21301139291 and 21301139300.

It is not a weakly prime, because it can be changed into another prime (21301139023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650569661 + 10650569662.

It is an arithmetic number, because the mean of its divisors is an integer number (10650569662).

Almost surely, 2^21301139323 is an apocalyptic number.

21301139323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301139323 is an equidigital number, since it uses as much as digits as its factorization.

21301139323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 21301139323 its reverse (32393110312), we get a palindrome (53694249635).

The spelling of 21301139323 in words is "twenty-one billion, three hundred one million, one hundred thirty-nine thousand, three hundred twenty-three".