123921241563 has 16 divisors (see below), whose sum is σ = 189476856576. Its totient is φ = 70570454880.

The previous prime is 123921241553. The next prime is 123921241579. The reversal of 123921241563 is 365142129321.

It is not a de Polignac number, because 123921241563 - 2¹⁴ = 123921225179 is a prime.

It is a super-2 number, since 2×123921241563² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123921241513) 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 in 15 ways as a sum of consecutive naturals, for example, 10063833 + ... + 10076138.

It is an arithmetic number, because the mean of its divisors is an integer number (11842303536).

Almost surely, 2^123921241563 is an apocalyptic number.

123921241563 is a deficient number, since it is larger than the sum of its proper divisors (65555615013).

123921241563 is a wasteful number, since it uses less digits than its factorization.

123921241563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20140274.

The product of its digits is 77760, while the sum is 39.

The spelling of 123921241563 in words is "one hundred twenty-three billion, nine hundred twenty-one million, two hundred forty-one thousand, five hundred sixty-three".