13561421103 has 6 divisors (see below), whose sum is σ = 19588719384. Its totient is φ = 9040947396.

The previous prime is 13561421099. The next prime is 13561421131. The reversal of 13561421103 is 30112416531.

It is a happy number.

13561421103 is a `hidden beast` number, since 1 + 35 + 614 + 2 + 1 + 10 + 3 = 666.

It is not a de Polignac number, because 13561421103 - 2² = 13561421099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13561423103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 753412275 + ... + 753412292.

It is an arithmetic number, because the mean of its divisors is an integer number (3264786564).

Almost surely, 2^13561421103 is an apocalyptic number.

13561421103 is a deficient number, since it is larger than the sum of its proper divisors (6027298281).

13561421103 is a wasteful number, since it uses less digits than its factorization.

13561421103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506824573 (or 1506824570 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 13561421103 its reverse (30112416531), we get a palindrome (43673837634).

The spelling of 13561421103 in words is "thirteen billion, five hundred sixty-one million, four hundred twenty-one thousand, one hundred three".