13123133021 has 8 divisors (see below), whose sum is σ = 13292947584. Its totient is φ = 12954192160.

The previous prime is 13123133011. The next prime is 13123133029. The reversal of 13123133021 is 12033132131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13123133021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13123132984 and 13123133002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123133029) 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, 188165 + ... + 248298.

It is an arithmetic number, because the mean of its divisors is an integer number (1661618448).

Almost surely, 2^13123133021 is an apocalyptic number.

It is an amenable number.

13123133021 is a deficient number, since it is larger than the sum of its proper divisors (169814563).

13123133021 is a wasteful number, since it uses less digits than its factorization.

13123133021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436851.

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

Adding to 13123133021 its reverse (12033132131), we get a palindrome (25156265152).

The spelling of 13123133021 in words is "thirteen billion, one hundred twenty-three million, one hundred thirty-three thousand, twenty-one".