13123233021 has 8 divisors (see below), whose sum is σ = 17515557504. Its totient is φ = 8739865280.

The previous prime is 13123233017. The next prime is 13123233023. The reversal of 13123233021 is 12033232131.

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 13123233021 - 2² = 13123233017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123233023) 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, 2235765 + ... + 2241626.

It is an arithmetic number, because the mean of its divisors is an integer number (2189444688).

Almost surely, 2^13123233021 is an apocalyptic number.

It is an amenable number.

13123233021 is a deficient number, since it is larger than the sum of its proper divisors (4392324483).

13123233021 is an equidigital number, since it uses as much as digits as its factorization.

13123233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478371.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 13123233021 its reverse (12033232131), we get a palindrome (25156465152).

The spelling of 13123233021 in words is "thirteen billion, one hundred twenty-three million, two hundred thirty-three thousand, twenty-one".