1121539271 has 4 divisors (see below), whose sum is σ = 1170301872. Its totient is φ = 1072776672.

The previous prime is 1121539231. The next prime is 1121539273. The reversal of 1121539271 is 1729351211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1121539271 - 2⁶ = 1121539207 is a prime.

It is a super-2 number, since 2×1121539271² = 2515700672790422882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121539273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24381266 + ... + 24381311.

It is an arithmetic number, because the mean of its divisors is an integer number (292575468).

Almost surely, 2^1121539271 is an apocalyptic number.

1121539271 is a deficient number, since it is larger than the sum of its proper divisors (48762601).

1121539271 is an equidigital number, since it uses as much as digits as its factorization.

1121539271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48762600.

The product of its digits is 3780, while the sum is 32.

The square root of 1121539271 is about 33489.3904244314. The cubic root of 1121539271 is about 1038.9743558949.

The spelling of 1121539271 in words is "one billion, one hundred twenty-one million, five hundred thirty-nine thousand, two hundred seventy-one".