1311141221 has 8 divisors (see below), whose sum is σ = 1415280384. Its totient is φ = 1207470960.

The previous prime is 1311141217. The next prime is 1311141233. The reversal of 1311141221 is 1221411131.

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 1311141221 - 2² = 1311141217 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 1311141221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311141241) 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, 111401 + ... + 122606.

It is an arithmetic number, because the mean of its divisors is an integer number (176910048).

Almost surely, 2^1311141221 is an apocalyptic number.

It is an amenable number.

1311141221 is a deficient number, since it is larger than the sum of its proper divisors (104139163).

1311141221 is a wasteful number, since it uses less digits than its factorization.

1311141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234451.

The product of its digits is 48, while the sum is 17.

The square root of 1311141221 is about 36209.6840776055. The cubic root of 1311141221 is about 1094.5018260284.

Adding to 1311141221 its reverse (1221411131), we get a palindrome (2532552352).

The spelling of 1311141221 in words is "one billion, three hundred eleven million, one hundred forty-one thousand, two hundred twenty-one".