11220311111131 has 4 divisors (see below), whose sum is σ = 11378343662064. Its totient is φ = 11062278560200.

The previous prime is 11220311111117. The next prime is 11220311111147. The reversal of 11220311111131 is 13111111302211.

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 11220311111131 - 2⁷ = 11220311111003 is a prime.

It is a super-2 number, since 2×11220311111131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220311111099 and 11220311111108.

It is not an unprimeable number, because it can be changed into a prime (11220311117131) 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, 79016275360 + ... + 79016275501.

It is an arithmetic number, because the mean of its divisors is an integer number (2844585915516).

Almost surely, 2^{11220311111131} is an apocalyptic number.

11220311111131 is a deficient number, since it is larger than the sum of its proper divisors (158032550933).

11220311111131 is an equidigital number, since it uses as much as digits as its factorization.

11220311111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158032550932.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 11220311111131 its reverse (13111111302211), we get a palindrome (24331422413342).

The spelling of 11220311111131 in words is "eleven trillion, two hundred twenty billion, three hundred eleven million, one hundred eleven thousand, one hundred thirty-one".