124112142145 has 4 divisors (see below), whose sum is σ = 148934570580. Its totient is φ = 99289713712.

The previous prime is 124112142127. The next prime is 124112142157. The reversal of 124112142145 is 541241211421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541241211421 = 29 ⋅18663490049.

It can be written as a sum of positive squares in 2 ways, for example, as 75154384449 + 48957757696 = 274143^2 + 221264^2 .

It is a cyclic number.

It is not a de Polignac number, because 124112142145 - 2¹⁹ = 124111617857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12411214210 + ... + 12411214219.

It is an arithmetic number, because the mean of its divisors is an integer number (37233642645).

Almost surely, 2^124112142145 is an apocalyptic number.

It is an amenable number.

124112142145 is a deficient number, since it is larger than the sum of its proper divisors (24822428435).

124112142145 is an equidigital number, since it uses as much as digits as its factorization.

124112142145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24822428434.

The product of its digits is 2560, while the sum is 28.

Adding to 124112142145 its reverse (541241211421), we get a palindrome (665353353566).

The spelling of 124112142145 in words is "one hundred twenty-four billion, one hundred twelve million, one hundred forty-two thousand, one hundred forty-five".