13611105421 has 16 divisors (see below), whose sum is σ = 14070744576. Its totient is φ = 13158000000.

The previous prime is 13611105419. The next prime is 13611105433. The reversal of 13611105421 is 12450111631.

It is a cyclic number.

It is not a de Polignac number, because 13611105421 - 2¹ = 13611105419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13611105121) 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, 2665771 + ... + 2670871.

It is an arithmetic number, because the mean of its divisors is an integer number (879421536).

Almost surely, 2^13611105421 is an apocalyptic number.

It is an amenable number.

13611105421 is a deficient number, since it is larger than the sum of its proper divisors (459639155).

13611105421 is a wasteful number, since it uses less digits than its factorization.

13611105421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5724.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 13611105421 in words is "thirteen billion, six hundred eleven million, one hundred five thousand, four hundred twenty-one".