1321113515145 has 8 divisors (see below), whose sum is σ = 2113781624256. Its totient is φ = 704593874736.

The previous prime is 1321113515143. The next prime is 1321113515147. The reversal of 1321113515145 is 5415153111231.

It is an interprime number because it is at equal distance from previous prime (1321113515143) and next prime (1321113515147).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321113515145 - 2¹ = 1321113515143 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321113515143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44037117157 + ... + 44037117186.

It is an arithmetic number, because the mean of its divisors is an integer number (264222703032).

Almost surely, 2^{1321113515145} is an apocalyptic number.

1321113515145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321113515145 is a deficient number, since it is larger than the sum of its proper divisors (792668109111).

1321113515145 is an equidigital number, since it uses as much as digits as its factorization.

1321113515145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88074234351.

The product of its digits is 9000, while the sum is 33.

Adding to 1321113515145 its reverse (5415153111231), we get a palindrome (6736266626376).

The spelling of 1321113515145 in words is "one trillion, three hundred twenty-one billion, one hundred thirteen million, five hundred fifteen thousand, one hundred forty-five".