1313821123 has 8 divisors (see below), whose sum is σ = 1353346592. Its totient is φ = 1274507136.

The previous prime is 1313821121. The next prime is 1313821151. The reversal of 1313821123 is 3211283131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1313821123 - 2¹ = 1313821121 is a prime.

It is a super-2 number, since 2×1313821123² = 3452251886481962258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313821121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40215 + ... + 65152.

It is an arithmetic number, because the mean of its divisors is an integer number (169168324).

Almost surely, 2^1313821123 is an apocalyptic number.

1313821123 is a deficient number, since it is larger than the sum of its proper divisors (39525469).

1313821123 is a wasteful number, since it uses less digits than its factorization.

1313821123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105741.

The product of its digits is 864, while the sum is 25.

The square root of 1313821123 is about 36246.6705091654. The cubic root of 1313821123 is about 1095.2470194641.

The spelling of 1313821123 in words is "one billion, three hundred thirteen million, eight hundred twenty-one thousand, one hundred twenty-three".