13021023111 has 4 divisors (see below), whose sum is σ = 17361364152. Its totient is φ = 8680682072.

The previous prime is 13021023053. The next prime is 13021023137. The reversal of 13021023111 is 11132012031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13021023111 - 2¹¹ = 13021021063 is a prime.

It is a super-2 number, since 2×13021023111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021023181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2170170516 + ... + 2170170521.

It is an arithmetic number, because the mean of its divisors is an integer number (4340341038).

Almost surely, 2^13021023111 is an apocalyptic number.

13021023111 is a deficient number, since it is larger than the sum of its proper divisors (4340341041).

13021023111 is an equidigital number, since it uses as much as digits as its factorization.

13021023111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340341040.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13021023111 its reverse (11132012031), we get a palindrome (24153035142).

The spelling of 13021023111 in words is "thirteen billion, twenty-one million, twenty-three thousand, one hundred eleven".