21221140183 has 2 divisors, whose sum is σ = 21221140184. Its totient is φ = 21221140182.

The previous prime is 21221140169. The next prime is 21221140207. The reversal of 21221140183 is 38104112212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221140183 - 2⁹ = 21221139671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221140583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610570091 + 10610570092.

It is an arithmetic number, because the mean of its divisors is an integer number (10610570092).

Almost surely, 2^21221140183 is an apocalyptic number.

21221140183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221140183 is an equidigital number, since it uses as much as digits as its factorization.

21221140183 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 25.

Adding to 21221140183 its reverse (38104112212), we get a palindrome (59325252395).

The spelling of 21221140183 in words is "twenty-one billion, two hundred twenty-one million, one hundred forty thousand, one hundred eighty-three".