1215001431125 has 8 divisors (see below), whose sum is σ = 1516321786200. Its totient is φ = 972001144800.

The previous prime is 1215001431107. The next prime is 1215001431131. The reversal of 1215001431125 is 5211341005121.

It can be written as a sum of positive squares in 4 ways, for example, as 370408516 + 1214631022609 = 19246^2 + 1102103^2 .

It is not a de Polignac number, because 1215001431125 - 2¹⁸ = 1215001168981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215001431094 and 1215001431103.

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, 4860005600 + ... + 4860005849.

It is an arithmetic number, because the mean of its divisors is an integer number (189540223275).

Almost surely, 2^{1215001431125} is an apocalyptic number.

It is an amenable number.

1215001431125 is a deficient number, since it is larger than the sum of its proper divisors (301320355075).

1215001431125 is an frugal number, since it uses more digits than its factorization.

1215001431125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720011464 (or 9720011454 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 1215001431125 its reverse (5211341005121), we get a palindrome (6426342436246).

The spelling of 1215001431125 in words is "one trillion, two hundred fifteen billion, one million, four hundred thirty-one thousand, one hundred twenty-five".