921312271 has 12 divisors (see below), whose sum is σ = 1037387232. Its totient is φ = 817124000.

The previous prime is 921312253. The next prime is 921312289. The reversal of 921312271 is 172213129.

It is an interprime number because it is at equal distance from previous prime (921312253) and next prime (921312289).

It is not a de Polignac number, because 921312271 - 2⁷ = 921312143 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 (921312251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87895 + ... + 97816.

It is an arithmetic number, because the mean of its divisors is an integer number (86448936).

Almost surely, 2^921312271 is an apocalyptic number.

921312271 is a deficient number, since it is larger than the sum of its proper divisors (116074961).

921312271 is a wasteful number, since it uses less digits than its factorization.

921312271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185774 (or 185763 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 921312271 is about 30353.1262146093. The cubic root of 921312271 is about 973.0510341035.

The spelling of 921312271 in words is "nine hundred twenty-one million, three hundred twelve thousand, two hundred seventy-one".