1171321421 has 8 divisors (see below), whose sum is σ = 1175226624. Its totient is φ = 1167423840.

The previous prime is 1171321399. The next prime is 1171321511. The reversal of 1171321421 is 1241231711.

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 1171321421 - 2³⁰ = 97579597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171321121) 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, 491585 + ... + 493961.

It is an arithmetic number, because the mean of its divisors is an integer number (146903328).

Almost surely, 2^1171321421 is an apocalyptic number.

It is an amenable number.

1171321421 is a deficient number, since it is larger than the sum of its proper divisors (3905203).

1171321421 is an equidigital number, since it uses as much as digits as its factorization.

1171321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811.

The product of its digits is 336, while the sum is 23.

The square root of 1171321421 is about 34224.5733501530. The cubic root of 1171321421 is about 1054.1247942402.

The spelling of 1171321421 in words is "one billion, one hundred seventy-one million, three hundred twenty-one thousand, four hundred twenty-one".