11131020111 has 4 divisors (see below), whose sum is σ = 14841360152. Its totient is φ = 7420680072.

The previous prime is 11131020107. The next prime is 11131020127. The reversal of 11131020111 is 11102013111.

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

It is not a de Polignac number, because 11131020111 - 2² = 11131020107 is a prime.

It is a super-2 number, since 2×11131020111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131020311) 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, 1855170016 + ... + 1855170021.

It is an arithmetic number, because the mean of its divisors is an integer number (3710340038).

Almost surely, 2^11131020111 is an apocalyptic number.

11131020111 is a deficient number, since it is larger than the sum of its proper divisors (3710340041).

11131020111 is an equidigital number, since it uses as much as digits as its factorization.

11131020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710340040.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 11131020111 its reverse (11102013111), we get a palindrome (22233033222).

The spelling of 11131020111 in words is "eleven billion, one hundred thirty-one million, twenty thousand, one hundred eleven".