13101213121 has 4 divisors (see below), whose sum is σ = 13103270100. Its totient is φ = 13099156144.

The previous prime is 13101213113. The next prime is 13101213137. The reversal of 13101213121 is 12131210131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12131210131 = 61507 ⋅197233.

It can be written as a sum of positive squares in 2 ways, for example, as 68707521 + 13032505600 = 8289^2 + 114160^2 .

It is a cyclic number.

It is not a de Polignac number, because 13101213121 - 2³ = 13101213113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13101213095 and 13101213104.

It is not an unprimeable number, because it can be changed into a prime (13101213161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018906 + ... + 1031683.

It is an arithmetic number, because the mean of its divisors is an integer number (3275817525).

Almost surely, 2^13101213121 is an apocalyptic number.

It is an amenable number.

13101213121 is a deficient number, since it is larger than the sum of its proper divisors (2056979).

13101213121 is an equidigital number, since it uses as much as digits as its factorization.

13101213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056978.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 13101213121 its reverse (12131210131), we get a palindrome (25232423252).

The spelling of 13101213121 in words is "thirteen billion, one hundred one million, two hundred thirteen thousand, one hundred twenty-one".