1215125311403 has 12 divisors (see below), whose sum is σ = 1275710435688. Its totient is φ = 1157152812480.

The previous prime is 1215125311373. The next prime is 1215125311409. The reversal of 1215125311403 is 3041135215121.

It is a happy number.

It is not a de Polignac number, because 1215125311403 - 2¹⁰ = 1215125310379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215125311409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9834893 + ... + 9957678.

It is an arithmetic number, because the mean of its divisors is an integer number (106309202974).

Almost surely, 2^{1215125311403} is an apocalyptic number.

1215125311403 is a deficient number, since it is larger than the sum of its proper divisors (60585124285).

1215125311403 is an equidigital number, since it uses as much as digits as its factorization.

1215125311403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19792702 (or 19792673 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 1215125311403 in words is "one trillion, two hundred fifteen billion, one hundred twenty-five million, three hundred eleven thousand, four hundred three".