13121000001 has 16 divisors (see below), whose sum is σ = 19464227200. Its totient is φ = 8735764464.

The previous prime is 13120999951. The next prime is 13121000089. The reversal of 13121000001 is 10000012131.

It is not a de Polignac number, because 13121000001 - 2³⁰ = 12047258177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121020001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300541 + ... + 341418.

It is an arithmetic number, because the mean of its divisors is an integer number (1216514200).

Almost surely, 2^13121000001 is an apocalyptic number.

It is an amenable number.

13121000001 is a deficient number, since it is larger than the sum of its proper divisors (6343227199).

13121000001 is an equidigital number, since it uses as much as digits as its factorization.

13121000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642725 (or 642719 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 13121000001 its reverse (10000012131), we get a palindrome (23121012132).

The spelling of 13121000001 in words is "thirteen billion, one hundred twenty-one million, one", and thus it is an aban number.