11220031031 has 16 divisors (see below), whose sum is σ = 13017096960. Its totient is φ = 9563546880.

The previous prime is 11220031001. The next prime is 11220031033. The reversal of 11220031031 is 13013002211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220031031 is a prime.

It is a super-2 number, since 2×11220031031² (a number of 21 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 = 11220030997 and 11220031015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220031033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256451 + ... + 296996.

It is an arithmetic number, because the mean of its divisors is an integer number (813568560).

Almost surely, 2^11220031031 is an apocalyptic number.

11220031031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11220031031 is a deficient number, since it is larger than the sum of its proper divisors (1797065929).

11220031031 is a wasteful number, since it uses less digits than its factorization.

11220031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553574.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 11220031031 its reverse (13013002211), we get a palindrome (24233033242).

The spelling of 11220031031 in words is "eleven billion, two hundred twenty million, thirty-one thousand, thirty-one".