13311011021 has 16 divisors (see below), whose sum is σ = 16598601600. Its totient is φ = 10370306880.

The previous prime is 13311011009. The next prime is 13311011023. The reversal of 13311011021 is 12011011331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13311011021 - 2¹⁸ = 13310748877 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13311010987 and 13311011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13311011023) 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, 522635 + ... + 547511.

It is an arithmetic number, because the mean of its divisors is an integer number (1037412600).

Almost surely, 2^13311011021 is an apocalyptic number.

13311011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13311011021 is a deficient number, since it is larger than the sum of its proper divisors (3287590579).

13311011021 is a wasteful number, since it uses less digits than its factorization.

13311011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31844.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 13311011021 its reverse (12011011331), we get a palindrome (25322022352).

The spelling of 13311011021 in words is "thirteen billion, three hundred eleven million, eleven thousand, twenty-one".