21302232011 has 2 divisors, whose sum is σ = 21302232012. Its totient is φ = 21302232010.

The previous prime is 21302232001. The next prime is 21302232019. The reversal of 21302232011 is 11023220312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302232011 - 2⁶ = 21302231947 is a prime.

It is not a weakly prime, because it can be changed into another prime (21302232019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651116005 + 10651116006.

It is an arithmetic number, because the mean of its divisors is an integer number (10651116006).

Almost surely, 2^21302232011 is an apocalyptic number.

21302232011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302232011 is an equidigital number, since it uses as much as digits as its factorization.

21302232011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21302232011 its reverse (11023220312), we get a palindrome (32325452323).

The spelling of 21302232011 in words is "twenty-one billion, three hundred two million, two hundred thirty-two thousand, eleven".