1311221127 has 8 divisors (see below), whose sum is σ = 1748774016. Its totient is φ = 873907832.

The previous prime is 1311221111. The next prime is 1311221143. The reversal of 1311221127 is 7211221131.

It is an interprime number because it is at equal distance from previous prime (1311221111) and next prime (1311221143).

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 1311221127 - 2⁴ = 1311221111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311221147) 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, 46713 + ... + 69314.

It is an arithmetic number, because the mean of its divisors is an integer number (218596752).

Almost surely, 2^1311221127 is an apocalyptic number.

1311221127 is a deficient number, since it is larger than the sum of its proper divisors (437552889).

1311221127 is a wasteful number, since it uses less digits than its factorization.

1311221127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119797.

The product of its digits is 168, while the sum is 21.

The square root of 1311221127 is about 36210.7874396567. The cubic root of 1311221127 is about 1094.5240599635.

Adding to 1311221127 its reverse (7211221131), we get a palindrome (8522442258).

The spelling of 1311221127 in words is "one billion, three hundred eleven million, two hundred twenty-one thousand, one hundred twenty-seven".