1331023122 has 96 divisors (see below), whose sum is σ = 3399701760. Its totient is φ = 371036160.

The previous prime is 1331023117. The next prime is 1331023151. The reversal of 1331023122 is 2213201331.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1331023095 and 1331023104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 943954 + ... + 945362.

It is an arithmetic number, because the mean of its divisors is an integer number (35413560).

Almost surely, 2^1331023122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331023122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699850880).

1331023122 is an abundant number, since it is smaller than the sum of its proper divisors (2068678638).

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

1331023122 is a wasteful number, since it uses less digits than its factorization.

1331023122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1331023122 is about 36483.1895809563. The cubic root of 1331023122 is about 1100.0063696601.

Adding to 1331023122 its reverse (2213201331), we get a palindrome (3544224453).

The spelling of 1331023122 in words is "one billion, three hundred thirty-one million, twenty-three thousand, one hundred twenty-two".