1215125311373 has 2 divisors, whose sum is σ = 1215125311374. Its totient is φ = 1215125311372.

The previous prime is 1215125311369. The next prime is 1215125311409. The reversal of 1215125311373 is 3731135215121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714368111209 + 500757200164 = 845203^2 + 707642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215125311373 - 2² = 1215125311369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215125311333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607562655686 + 607562655687.

It is an arithmetic number, because the mean of its divisors is an integer number (607562655687).

Almost surely, 2^{1215125311373} is an apocalyptic number.

It is an amenable number.

1215125311373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215125311373 is an equidigital number, since it uses as much as digits as its factorization.

1215125311373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 35.

The spelling of 1215125311373 in words is "one trillion, two hundred fifteen billion, one hundred twenty-five million, three hundred eleven thousand, three hundred seventy-three".