124155421573 has 2 divisors, whose sum is σ = 124155421574. Its totient is φ = 124155421572.

The previous prime is 124155421567. The next prime is 124155421619. The reversal of 124155421573 is 375124551421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114970499329 + 9184922244 = 339073^2 + 95838^2 .

It is a cyclic number.

It is not a de Polignac number, because 124155421573 - 2²⁵ = 124121867141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124155431573) 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, 62077710786 + 62077710787.

It is an arithmetic number, because the mean of its divisors is an integer number (62077710787).

Almost surely, 2^124155421573 is an apocalyptic number.

It is an amenable number.

124155421573 is a deficient number, since it is larger than the sum of its proper divisors (1).

124155421573 is an equidigital number, since it uses as much as digits as its factorization.

124155421573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168000, while the sum is 40.

Adding to 124155421573 its reverse (375124551421), we get a palindrome (499279972994).

The spelling of 124155421573 in words is "one hundred twenty-four billion, one hundred fifty-five million, four hundred twenty-one thousand, five hundred seventy-three".