1321130191 has 8 divisors (see below), whose sum is σ = 1352033280. Its totient is φ = 1290343608.

The previous prime is 1321130147. The next prime is 1321130201. The reversal of 1321130191 is 1910311231.

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 1321130191 - 2¹⁵ = 1321097423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321130101) 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, 5971 + ... + 51748.

It is an arithmetic number, because the mean of its divisors is an integer number (169004160).

Almost surely, 2^1321130191 is an apocalyptic number.

1321130191 is a deficient number, since it is larger than the sum of its proper divisors (30903089).

1321130191 is an equidigital number, since it uses as much as digits as its factorization.

1321130191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58253.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1321130191 is about 36347.3546630288. The cubic root of 1321130191 is about 1097.2742958740.

The spelling of 1321130191 in words is "one billion, three hundred twenty-one million, one hundred thirty thousand, one hundred ninety-one".