1311021322 has 8 divisors (see below), whose sum is σ = 2117803716. Its totient is φ = 605086752.

The previous prime is 1311021293. The next prime is 1311021323. The reversal of 1311021322 is 2231201131.

It can be written as a sum of positive squares in 2 ways, for example, as 1286011321 + 25010001 = 35861^2 + 5001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1311021296 and 1311021305.

It is not an unprimeable number, because it can be changed into a prime (1311021323) 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, 25211923 + ... + 25211974.

Almost surely, 2^1311021322 is an apocalyptic number.

1311021322 is a deficient number, since it is larger than the sum of its proper divisors (806782394).

1311021322 is a wasteful number, since it uses less digits than its factorization.

1311021322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50423912.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1311021322 is about 36208.0284191227. The cubic root of 1311021322 is about 1094.4684623010.

Adding to 1311021322 its reverse (2231201131), we get a palindrome (3542222453).

The spelling of 1311021322 in words is "one billion, three hundred eleven million, twenty-one thousand, three hundred twenty-two".