21221201021183 has 2 divisors, whose sum is σ = 21221201021184. Its totient is φ = 21221201021182.

The previous prime is 21221201021093. The next prime is 21221201021203. The reversal of 21221201021183 is 38112010212212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221201021183 - 2³² = 21216906053887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221201011183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610600510591 + 10610600510592.

It is an arithmetic number, because the mean of its divisors is an integer number (10610600510592).

Almost surely, 2^{21221201021183} is an apocalyptic number.

21221201021183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221201021183 is an equidigital number, since it uses as much as digits as its factorization.

21221201021183 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

Adding to 21221201021183 its reverse (38112010212212), we get a palindrome (59333211233395).

The spelling of 21221201021183 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred one million, twenty-one thousand, one hundred eighty-three".