124621521812 has 6 divisors (see below), whose sum is σ = 218087663178. Its totient is φ = 62310760904.

The previous prime is 124621521803. The next prime is 124621521839. The reversal of 124621521812 is 218125126421.

It can be written as a sum of positive squares in only one way, i.e., 124498888336 + 122633476 = 352844^2 + 11074^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15577690223 + ... + 15577690230.

It is an arithmetic number, because the mean of its divisors is an integer number (36347943863).

Almost surely, 2^124621521812 is an apocalyptic number.

It is an amenable number.

124621521812 is a deficient number, since it is larger than the sum of its proper divisors (93466141366).

124621521812 is a wasteful number, since it uses less digits than its factorization.

124621521812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31155380457 (or 31155380455 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The spelling of 124621521812 in words is "one hundred twenty-four billion, six hundred twenty-one million, five hundred twenty-one thousand, eight hundred twelve".