21221132323 has 2 divisors, whose sum is σ = 21221132324. Its totient is φ = 21221132322.

The previous prime is 21221132311. The next prime is 21221132327. The reversal of 21221132323 is 32323112212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221132323 - 2³³ = 12631197731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21221132294 and 21221132303.

It is not a weakly prime, because it can be changed into another prime (21221132327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610566161 + 10610566162.

It is an arithmetic number, because the mean of its divisors is an integer number (10610566162).

Almost surely, 2^21221132323 is an apocalyptic number.

21221132323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221132323 is an equidigital number, since it uses as much as digits as its factorization.

21221132323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

Adding to 21221132323 its reverse (32323112212), we get a palindrome (53544244535).

The spelling of 21221132323 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirty-two thousand, three hundred twenty-three".