124542103255321 has 4 divisors (see below), whose sum is σ = 126248159464372. Its totient is φ = 122836047046272.

The previous prime is 124542103255313. The next prime is 124542103255333. The reversal of 124542103255321 is 123552301245421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54308719608025 + 70233383647296 = 7369445^2 + 8380536^2 .

It is a cyclic number.

It is not a de Polignac number, because 124542103255321 - 2³ = 124542103255313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124542103255351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853028104416 + ... + 853028104561.

It is an arithmetic number, because the mean of its divisors is an integer number (31562039866093).

Almost surely, 2^{124542103255321} is an apocalyptic number.

It is an amenable number.

124542103255321 is a deficient number, since it is larger than the sum of its proper divisors (1706056209051).

124542103255321 is an equidigital number, since it uses as much as digits as its factorization.

124542103255321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706056209050.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 124542103255321 in words is "one hundred twenty-four trillion, five hundred forty-two billion, one hundred three million, two hundred fifty-five thousand, three hundred twenty-one".