11220342831 has 10 divisors (see below), whose sum is σ = 16761252992. Its totient is φ = 7480228500.

The previous prime is 11220342827. The next prime is 11220342851. The reversal of 11220342831 is 13824302211.

11220342831 is a `hidden beast` number, since 1 + 1 + 2 + 203 + 428 + 31 = 666.

11220342831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11220342831 - 2² = 11220342827 is a prime.

It is a super-2 number, since 2×11220342831² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220342795 and 11220342804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220342851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 69261295 + ... + 69261456.

Almost surely, 2^11220342831 is an apocalyptic number.

11220342831 is a deficient number, since it is larger than the sum of its proper divisors (5540910161).

11220342831 is an equidigital number, since it uses as much as digits as its factorization.

11220342831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138522763 (or 138522754 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 11220342831 in words is "eleven billion, two hundred twenty million, three hundred forty-two thousand, eight hundred thirty-one".