1311131022 has 16 divisors (see below), whose sum is σ = 2627955792. Its totient is φ = 436094720.

The previous prime is 1311130999. The next prime is 1311131033. The reversal of 1311131022 is 2201311131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1311130992 and 1311131010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234243 + ... + 239774.

It is an arithmetic number, because the mean of its divisors is an integer number (164247237).

Almost surely, 2^1311131022 is an apocalyptic number.

1311131022 is an abundant number, since it is smaller than the sum of its proper divisors (1316824770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311131022 is a wasteful number, since it uses less digits than its factorization.

1311131022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474483.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1311131022 is about 36209.5432448409. The cubic root of 1311131022 is about 1094.4989880801.

Adding to 1311131022 its reverse (2201311131), we get a palindrome (3512442153).

The spelling of 1311131022 in words is "one billion, three hundred eleven million, one hundred thirty-one thousand, twenty-two".