13011020111 has 4 divisors (see below), whose sum is σ = 13053401592. Its totient is φ = 12968638632.

The previous prime is 13011020107. The next prime is 13011020117. The reversal of 13011020111 is 11102011031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11102011031 = 239 ⋅46451929.

It is a cyclic number.

It is not a de Polignac number, because 13011020111 - 2² = 13011020107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13011020092 and 13011020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011020117) 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, 21190280 + ... + 21190893.

It is an arithmetic number, because the mean of its divisors is an integer number (3263350398).

Almost surely, 2^13011020111 is an apocalyptic number.

13011020111 is a deficient number, since it is larger than the sum of its proper divisors (42381481).

13011020111 is an equidigital number, since it uses as much as digits as its factorization.

13011020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42381480.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 13011020111 its reverse (11102011031), we get a palindrome (24113031142).

The spelling of 13011020111 in words is "thirteen billion, eleven million, twenty thousand, one hundred eleven".