1211313331 has 8 divisors (see below), whose sum is σ = 1275167520. Its totient is φ = 1148391552.

The previous prime is 1211313329. The next prime is 1211313343. The reversal of 1211313331 is 1333131121.

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 1211313331 - 2¹ = 1211313329 is a prime.

It is a super-2 number, since 2×1211313331² = 2934559971716631122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211313299 and 1211313308.

It is not an unprimeable number, because it can be changed into a prime (1211353331) 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, 230436 + ... + 235633.

It is an arithmetic number, because the mean of its divisors is an integer number (159395940).

Almost surely, 2^1211313331 is an apocalyptic number.

1211313331 is a deficient number, since it is larger than the sum of its proper divisors (63854189).

1211313331 is a wasteful number, since it uses less digits than its factorization.

1211313331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466205.

The product of its digits is 162, while the sum is 19.

The square root of 1211313331 is about 34803.9269479753. The cubic root of 1211313331 is about 1065.9876313734.

Adding to 1211313331 its reverse (1333131121), we get a palindrome (2544444452).

The spelling of 1211313331 in words is "one billion, two hundred eleven million, three hundred thirteen thousand, three hundred thirty-one".