13125421035 has 40 divisors (see below), whose sum is σ = 23859972576. Its totient is φ = 6901614720.

The previous prime is 13125421031. The next prime is 13125421037. The reversal of 13125421035 is 53012452131.

13125421035 is a `hidden beast` number, since 1 + 3 + 12 + 542 + 103 + 5 = 666.

It is not a de Polignac number, because 13125421035 - 2² = 13125421031 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (13125421031) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 199474 + ... + 256983.

Almost surely, 2^13125421035 is an apocalyptic number.

13125421035 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13125421035 is a deficient number, since it is larger than the sum of its proper divisors (10734551541).

13125421035 is an equidigital number, since it uses as much as digits as its factorization.

13125421035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456545 (or 456536 counting only the distinct ones).

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

Adding to 13125421035 its reverse (53012452131), we get a palindrome (66137873166).

The spelling of 13125421035 in words is "thirteen billion, one hundred twenty-five million, four hundred twenty-one thousand, thirty-five".