13102111421 has 6 divisors (see below), whose sum is σ = 15241231710. Its totient is φ = 11230381176.

The previous prime is 13102111381. The next prime is 13102111427. The reversal of 13102111421 is 12411120131.

It can be written as a sum of positive squares in only one way, i.e., 6736305625 + 6365805796 = 82075^2 + 79786^2 .

It is not a de Polignac number, because 13102111421 - 2¹⁰ = 13102110397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13102111421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13102111427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133694966 + ... + 133695063.

It is an arithmetic number, because the mean of its divisors is an integer number (2540205285).

Almost surely, 2^13102111421 is an apocalyptic number.

It is an amenable number.

13102111421 is a deficient number, since it is larger than the sum of its proper divisors (2139120289).

13102111421 is an equidigital number, since it uses as much as digits as its factorization.

13102111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267390043 (or 267390036 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 13102111421 its reverse (12411120131), we get a palindrome (25513231552).

The spelling of 13102111421 in words is "thirteen billion, one hundred two million, one hundred eleven thousand, four hundred twenty-one".