13521123045 has 160 divisors (see below), whose sum is σ = 26817626880. Its totient is φ = 6487050240.

The previous prime is 13521123041. The next prime is 13521123047. The reversal of 13521123045 is 54032112531.

13521123045 is a `hidden beast` number, since 1 + 352 + 1 + 1 + 2 + 304 + 5 = 666.

It is not a de Polignac number, because 13521123045 - 2² = 13521123041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521123041) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 42653227 + ... + 42653543.

It is an arithmetic number, because the mean of its divisors is an integer number (167610168).

Almost surely, 2^13521123045 is an apocalyptic number.

13521123045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13521123045 is a deficient number, since it is larger than the sum of its proper divisors (13296503835).

13521123045 is a wasteful number, since it uses less digits than its factorization.

13521123045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 13521123045 its reverse (54032112531), we get a palindrome (67553235576).

The spelling of 13521123045 in words is "thirteen billion, five hundred twenty-one million, one hundred twenty-three thousand, forty-five".