123512141321 has 4 divisors (see below), whose sum is σ = 123531638292. Its totient is φ = 123492644352.

The previous prime is 123512141317. The next prime is 123512141329. The reversal of 123512141321 is 123141215321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123141215321 = 53 ⋅2323419157.

It can be written as a sum of positive squares in 2 ways, for example, as 53008615696 + 70503525625 = 230236^2 + 265525^2 .

It is a cyclic number.

It is not a de Polignac number, because 123512141321 - 2² = 123512141317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123512141329) 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, 9738980 + ... + 9751653.

It is an arithmetic number, because the mean of its divisors is an integer number (30882909573).

Almost surely, 2^123512141321 is an apocalyptic number.

It is an amenable number.

123512141321 is a deficient number, since it is larger than the sum of its proper divisors (19496971).

123512141321 is an equidigital number, since it uses as much as digits as its factorization.

123512141321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19496970.

The product of its digits is 1440, while the sum is 26.

Adding to 123512141321 its reverse (123141215321), we get a palindrome (246653356642).

The spelling of 123512141321 in words is "one hundred twenty-three billion, five hundred twelve million, one hundred forty-one thousand, three hundred twenty-one".