1311231022 has 8 divisors (see below), whose sum is σ = 1973947896. Its totient is φ = 653248392.

The previous prime is 1311231017. The next prime is 1311231067. The reversal of 1311231022 is 2201321131.

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 = 1311230987 and 1311231005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1182868 + ... + 1183975.

It is an arithmetic number, because the mean of its divisors is an integer number (246743487).

Almost surely, 2^1311231022 is an apocalyptic number.

1311231022 is a deficient number, since it is larger than the sum of its proper divisors (662716874).

1311231022 is a wasteful number, since it uses less digits than its factorization.

1311231022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367122.

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

The square root of 1311231022 is about 36210.9240699544. The cubic root of 1311231022 is about 1094.5268131956.

Adding to 1311231022 its reverse (2201321131), we get a palindrome (3512552153).

The spelling of 1311231022 in words is "one billion, three hundred eleven million, two hundred thirty-one thousand, twenty-two".