124545347821 has 2 divisors, whose sum is σ = 124545347822. Its totient is φ = 124545347820.

The previous prime is 124545347813. The next prime is 124545347867. The reversal of 124545347821 is 128743545421.

It is a happy number.

It is an a-pointer prime, because the next prime (124545347867) can be obtained adding 124545347821 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104643192196 + 19902155625 = 323486^2 + 141075^2 .

It is a cyclic number.

It is not a de Polignac number, because 124545347821 - 2³ = 124545347813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124545347891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62272673910 + 62272673911.

It is an arithmetic number, because the mean of its divisors is an integer number (62272673911).

Almost surely, 2^124545347821 is an apocalyptic number.

It is an amenable number.

124545347821 is a deficient number, since it is larger than the sum of its proper divisors (1).

124545347821 is an equidigital number, since it uses as much as digits as its factorization.

124545347821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1075200, while the sum is 46.

The spelling of 124545347821 in words is "one hundred twenty-four billion, five hundred forty-five million, three hundred forty-seven thousand, eight hundred twenty-one".