1321115631503 has 8 divisors (see below), whose sum is σ = 1323140106240. Its totient is φ = 1319091373600.

The previous prime is 1321115631469. The next prime is 1321115631509. The reversal of 1321115631503 is 3051365111231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321115631503 - 2⁶ = 1321115631439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321115631503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321115631509) 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, 15555053 + ... + 15639753.

It is an arithmetic number, because the mean of its divisors is an integer number (165392513280).

Almost surely, 2^{1321115631503} is an apocalyptic number.

1321115631503 is a deficient number, since it is larger than the sum of its proper divisors (2024474737).

1321115631503 is an equidigital number, since it uses as much as digits as its factorization.

1321115631503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108417.

The product of its (nonzero) digits is 8100, while the sum is 32.

The spelling of 1321115631503 in words is "one trillion, three hundred twenty-one billion, one hundred fifteen million, six hundred thirty-one thousand, five hundred three".