13123331028 has 36 divisors (see below), whose sum is σ = 33209044960. Its totient is φ = 4369672656.

The previous prime is 13123331021. The next prime is 13123331041. The reversal of 13123331028 is 82013332131.

13123331028 is a `hidden beast` number, since 1 + 312 + 33 + 310 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 13123330992 and 13123331010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123331021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165250 + ... + 231417.

Almost surely, 2^13123331028 is an apocalyptic number.

13123331028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13123331028 is an abundant number, since it is smaller than the sum of its proper divisors (20085713932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13123331028 is a wasteful number, since it uses less digits than its factorization.

13123331028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397596 (or 397591 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 13123331028 its reverse (82013332131), we get a palindrome (95136663159).

It can be divided in two parts, 131233 and 31028, that added together give a palindrome (162261).

The spelling of 13123331028 in words is "thirteen billion, one hundred twenty-three million, three hundred thirty-one thousand, twenty-eight".