124142756221 has 8 divisors (see below), whose sum is σ = 136670925600. Its totient is φ = 111821664240.

The previous prime is 124142756219. The next prime is 124142756239. The reversal of 124142756221 is 122657241421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 124142756221 - 2¹ = 124142756219 is a prime.

It is a super-2 number, since 2×124142756221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124142756021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51768091 + ... + 51770488.

It is an arithmetic number, because the mean of its divisors is an integer number (17083865700).

Almost surely, 2^124142756221 is an apocalyptic number.

124142756221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124142756221 is a deficient number, since it is larger than the sum of its proper divisors (12528169379).

124142756221 is a wasteful number, since it uses less digits than its factorization.

124142756221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103538699.

The product of its digits is 53760, while the sum is 37.

Adding to 124142756221 its reverse (122657241421), we get a palindrome (246799997642).

The spelling of 124142756221 in words is "one hundred twenty-four billion, one hundred forty-two million, seven hundred fifty-six thousand, two hundred twenty-one".