1271231011 has 8 divisors (see below), whose sum is σ = 1284079104. Its totient is φ = 1258427520.

The previous prime is 1271230963. The next prime is 1271231029. The reversal of 1271231011 is 1101321721.

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 1271231011 - 2¹⁷ = 1271099939 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 1271231011.

It is not an unprimeable number, because it can be changed into a prime (1271231111) 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, 47691 + ... + 69403.

It is an arithmetic number, because the mean of its divisors is an integer number (160509888).

Almost surely, 2^1271231011 is an apocalyptic number.

1271231011 is a deficient number, since it is larger than the sum of its proper divisors (12848093).

1271231011 is a wasteful number, since it uses less digits than its factorization.

1271231011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22301.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 1271231011 is about 35654.3266799417. The cubic root of 1271231011 is about 1083.2819152138.

Adding to 1271231011 its reverse (1101321721), we get a palindrome (2372552732).

The spelling of 1271231011 in words is "one billion, two hundred seventy-one million, two hundred thirty-one thousand, eleven".