21172222483 has 2 divisors, whose sum is σ = 21172222484. Its totient is φ = 21172222482.

The previous prime is 21172222469. The next prime is 21172222517. The reversal of 21172222483 is 38422227112.

It is an a-pointer prime, because the next prime (21172222517) can be obtained adding 21172222483 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21172222483 is a prime.

It is not a weakly prime, because it can be changed into another prime (25172222483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10586111241 + 10586111242.

It is an arithmetic number, because the mean of its divisors is an integer number (10586111242).

Almost surely, 2^21172222483 is an apocalyptic number.

21172222483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21172222483 is an equidigital number, since it uses as much as digits as its factorization.

21172222483 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

Adding to 21172222483 its reverse (38422227112), we get a palindrome (59594449595).

The spelling of 21172222483 in words is "twenty-one billion, one hundred seventy-two million, two hundred twenty-two thousand, four hundred eighty-three".