13311111121 has 24 divisors (see below), whose sum is σ = 16899763104. Its totient is φ = 10367542080.

The previous prime is 13311111119. The next prime is 13311111133. The reversal of 13311111121 is 12111111331.

It is not a de Polignac number, because 13311111121 - 2¹ = 13311111119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13311111095 and 13311111104.

It is not an unprimeable number, because it can be changed into a prime (13311111101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1587486 + ... + 1595848.

It is an arithmetic number, because the mean of its divisors is an integer number (704156796).

Almost surely, 2^13311111121 is an apocalyptic number.

13311111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13311111121 is a deficient number, since it is larger than the sum of its proper divisors (3588651983).

13311111121 is a wasteful number, since it uses less digits than its factorization.

13311111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11341 (or 11334 counting only the distinct ones).

The product of its digits is 18, while the sum is 16.

Adding to 13311111121 its reverse (12111111331), we get a palindrome (25422222452).

The spelling of 13311111121 in words is "thirteen billion, three hundred eleven million, one hundred eleven thousand, one hundred twenty-one".