1331321123 has 4 divisors (see below), whose sum is σ = 1452350328. Its totient is φ = 1210291920.

The previous prime is 1331321113. The next prime is 1331321129. The reversal of 1331321123 is 3211231331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331321123 - 2⁸ = 1331320867 is a prime.

It is a super-2 number, since 2×1331321123² = 3544831865091962258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331321095 and 1331321104.

It is not an unprimeable number, because it can be changed into a prime (1331321129) 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, 60514586 + ... + 60514607.

It is an arithmetic number, because the mean of its divisors is an integer number (363087582).

Almost surely, 2^1331321123 is an apocalyptic number.

1331321123 is a deficient number, since it is larger than the sum of its proper divisors (121029205).

1331321123 is a wasteful number, since it uses less digits than its factorization.

1331321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121029204.

The product of its digits is 324, while the sum is 20.

The square root of 1331321123 is about 36487.2734388307. The cubic root of 1331321123 is about 1100.0884565229.

Adding to 1331321123 its reverse (3211231331), we get a palindrome (4542552454).

The spelling of 1331321123 in words is "one billion, three hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-three".