21232323011 has 4 divisors (see below), whose sum is σ = 21247203432. Its totient is φ = 21217442592.

The previous prime is 21232322989. The next prime is 21232323019. The reversal of 21232323011 is 11032323212.

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

It is a cyclic number.

It is not a de Polignac number, because 21232323011 - 2¹⁰ = 21232321987 is a prime.

It is a super-2 number, since 2×21232323011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21232323019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7438070 + ... + 7440923.

It is an arithmetic number, because the mean of its divisors is an integer number (5311800858).

Almost surely, 2^21232323011 is an apocalyptic number.

21232323011 is a deficient number, since it is larger than the sum of its proper divisors (14880421).

21232323011 is a wasteful number, since it uses less digits than its factorization.

21232323011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14880420.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21232323011 its reverse (11032323212), we get a palindrome (32264646223).

The spelling of 21232323011 in words is "twenty-one billion, two hundred thirty-two million, three hundred twenty-three thousand, eleven".