124512083221 has 4 divisors (see below), whose sum is σ = 124535091052. Its totient is φ = 124489075392.

The previous prime is 124512083207. The next prime is 124512083257. The reversal of 124512083221 is 122380215421.

It is a happy number.

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 20018288196 + 104493795025 = 141486^2 + 323255^2 .

It is a cyclic number.

It is not a de Polignac number, because 124512083221 - 2²⁵ = 124478528789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124512083261) 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, 11495796 + ... + 11506621.

It is an arithmetic number, because the mean of its divisors is an integer number (31133772763).

Almost surely, 2^124512083221 is an apocalyptic number.

It is an amenable number.

124512083221 is a deficient number, since it is larger than the sum of its proper divisors (23007831).

124512083221 is an equidigital number, since it uses as much as digits as its factorization.

124512083221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23007830.

The product of its (nonzero) digits is 7680, while the sum is 31.

Adding to 124512083221 its reverse (122380215421), we get a palindrome (246892298642).

The spelling of 124512083221 in words is "one hundred twenty-four billion, five hundred twelve million, eighty-three thousand, two hundred twenty-one".