123221947663 has 2 divisors, whose sum is σ = 123221947664. Its totient is φ = 123221947662.

The previous prime is 123221947643. The next prime is 123221947679. The reversal of 123221947663 is 366749122321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123221947663 is a prime.

It is a super-2 number, since 2×123221947663² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123221947643) 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, 61610973831 + 61610973832.

It is an arithmetic number, because the mean of its divisors is an integer number (61610973832).

Almost surely, 2^123221947663 is an apocalyptic number.

123221947663 is a deficient number, since it is larger than the sum of its proper divisors (1).

123221947663 is an equidigital number, since it uses as much as digits as its factorization.

123221947663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The spelling of 123221947663 in words is "one hundred twenty-three billion, two hundred twenty-one million, nine hundred forty-seven thousand, six hundred sixty-three".