1312521123 has 8 divisors (see below), whose sum is σ = 1774676736. Its totient is φ = 862689800.

The previous prime is 1312521073. The next prime is 1312521127. The reversal of 1312521123 is 3211252131.

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 1312521123 - 2⁹ = 1312520611 is a prime.

It is a super-2 number, since 2×1312521123² = 3445423396642362258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1312521123.

It is not an unprimeable number, because it can be changed into a prime (1312521127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3080823 + ... + 3081248.

It is an arithmetic number, because the mean of its divisors is an integer number (221834592).

Almost surely, 2^1312521123 is an apocalyptic number.

1312521123 is a deficient number, since it is larger than the sum of its proper divisors (462155613).

1312521123 is an equidigital number, since it uses as much as digits as its factorization.

1312521123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6162145.

The product of its digits is 360, while the sum is 21.

The square root of 1312521123 is about 36228.7333893969. The cubic root of 1312521123 is about 1094.8856585013.

Adding to 1312521123 its reverse (3211252131), we get a palindrome (4523773254).

The spelling of 1312521123 in words is "one billion, three hundred twelve million, five hundred twenty-one thousand, one hundred twenty-three".