124771250000209 has 4 divisors (see below), whose sum is σ = 125256741245604. Its totient is φ = 124285758754816.

The previous prime is 124771250000183. The next prime is 124771250000219. The reversal of 124771250000209 is 902000052177421.

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 93626233884225 + 31145016115984 = 9676065^2 + 5580772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124771250000209 is a prime.

It is a super-2 number, since 2×124771250000209² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124771250000219) 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, 242745622312 + ... + 242745622825.

It is an arithmetic number, because the mean of its divisors is an integer number (31314185311401).

Almost surely, 2^{124771250000209} is an apocalyptic number.

It is an amenable number.

124771250000209 is a deficient number, since it is larger than the sum of its proper divisors (485491245395).

124771250000209 is an equidigital number, since it uses as much as digits as its factorization.

124771250000209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485491245394.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 124771250000209 in words is "one hundred twenty-four trillion, seven hundred seventy-one billion, two hundred fifty million, two hundred nine", and thus it is an aban number.