13121001001 has 16 divisors (see below), whose sum is σ = 13478825088. Its totient is φ = 12768784000.

The previous prime is 13121000929. The next prime is 13121001011. The reversal of 13121001001 is 10010012131.

It is a cyclic number.

It is not a de Polignac number, because 13121001001 - 2⁹ = 13121000489 is a prime.

It is a super-3 number, since 3×13121001001³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121001011) 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, 2485701 + ... + 2490973.

It is an arithmetic number, because the mean of its divisors is an integer number (842426568).

Almost surely, 2^13121001001 is an apocalyptic number.

It is an amenable number.

13121001001 is a deficient number, since it is larger than the sum of its proper divisors (357824087).

13121001001 is a wasteful number, since it uses less digits than its factorization.

13121001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 13121001001 its reverse (10010012131), we get a palindrome (23131013132).

The spelling of 13121001001 in words is "thirteen billion, one hundred twenty-one million, one thousand, one".