13111455621 has 8 divisors (see below), whose sum is σ = 19071208224. Its totient is φ = 7946336720.

The previous prime is 13111455583. The next prime is 13111455629. The reversal of 13111455621 is 12655411131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13111455621 - 2⁷ = 13111455493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111455629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198658386 + ... + 198658451.

It is an arithmetic number, because the mean of its divisors is an integer number (2383901028).

Almost surely, 2^13111455621 is an apocalyptic number.

13111455621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13111455621 is a deficient number, since it is larger than the sum of its proper divisors (5959752603).

13111455621 is a wasteful number, since it uses less digits than its factorization.

13111455621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397316851.

The product of its digits is 3600, while the sum is 30.

Adding to 13111455621 its reverse (12655411131), we get a palindrome (25766866752).

The spelling of 13111455621 in words is "thirteen billion, one hundred eleven million, four hundred fifty-five thousand, six hundred twenty-one".