124002045443521 has 4 divisors (see below), whose sum is σ = 141716623364032. Its totient is φ = 106287467523012.

The previous prime is 124002045443401. The next prime is 124002045443537. The reversal of 124002045443521 is 125344540200421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 124002045443521 - 2¹⁵ = 124002045410753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124002045443021) 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, 8857288960245 + ... + 8857288960258.

It is an arithmetic number, because the mean of its divisors is an integer number (35429155841008).

Almost surely, 2^{124002045443521} is an apocalyptic number.

It is an amenable number.

124002045443521 is a deficient number, since it is larger than the sum of its proper divisors (17714577920511).

124002045443521 is an equidigital number, since it uses as much as digits as its factorization.

124002045443521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17714577920510.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 124002045443521 its reverse (125344540200421), we get a palindrome (249346585643942).

The spelling of 124002045443521 in words is "one hundred twenty-four trillion, two billion, forty-five million, four hundred forty-three thousand, five hundred twenty-one".