21221132311 has 2 divisors, whose sum is σ = 21221132312. Its totient is φ = 21221132310.

The previous prime is 21221132201. The next prime is 21221132323. The reversal of 21221132311 is 11323112212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21221132311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221132371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610566155 + 10610566156.

It is an arithmetic number, because the mean of its divisors is an integer number (10610566156).

Almost surely, 2^21221132311 is an apocalyptic number.

21221132311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221132311 is an equidigital number, since it uses as much as digits as its factorization.

21221132311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

Adding to 21221132311 its reverse (11323112212), we get a palindrome (32544244523).

The spelling of 21221132311 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirty-two thousand, three hundred eleven".