13121031101 has 4 divisors (see below), whose sum is σ = 13136414172. Its totient is φ = 13105648032.

The previous prime is 13121031097. The next prime is 13121031107. The reversal of 13121031101 is 10113012131.

It is a happy number.

13121031101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6640620100 + 6480411001 = 81490^2 + 80501^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121031101 - 2² = 13121031097 is a prime.

It is a super-2 number, since 2×13121031101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121031107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7690256 + ... + 7691961.

It is an arithmetic number, because the mean of its divisors is an integer number (3284103543).

Almost surely, 2^13121031101 is an apocalyptic number.

It is an amenable number.

13121031101 is a deficient number, since it is larger than the sum of its proper divisors (15383071).

13121031101 is an equidigital number, since it uses as much as digits as its factorization.

13121031101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15383070.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 13121031101 its reverse (10113012131), we get a palindrome (23234043232).

The spelling of 13121031101 in words is "thirteen billion, one hundred twenty-one million, thirty-one thousand, one hundred one".