1243101000125 has 8 divisors (see below), whose sum is σ = 1551390048312. Its totient is φ = 994480800000.

The previous prime is 1243101000073. The next prime is 1243101000139. The reversal of 1243101000125 is 5210001013421.

It can be written as a sum of positive squares in 4 ways, for example, as 11025420004 + 1232075580121 = 105002^2 + 1109989^2 .

It is not a de Polignac number, because 1243101000125 - 2⁶ = 1243101000061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243101000097 and 1243101000106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4972403876 + ... + 4972404125.

It is an arithmetic number, because the mean of its divisors is an integer number (193923756039).

Almost surely, 2^{1243101000125} is an apocalyptic number.

It is an amenable number.

1243101000125 is a deficient number, since it is larger than the sum of its proper divisors (308289048187).

1243101000125 is an frugal number, since it uses more digits than its factorization.

1243101000125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9944808016 (or 9944808006 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 1243101000125 its reverse (5210001013421), we get a palindrome (6453102013546).

The spelling of 1243101000125 in words is "one trillion, two hundred forty-three billion, one hundred one million, one hundred twenty-five", and thus it is an aban number.