11221200031 has 4 divisors (see below), whose sum is σ = 11226578832. Its totient is φ = 11215821232.

The previous prime is 11221200007. The next prime is 11221200043. The reversal of 11221200031 is 13000212211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13000212211 = 7 ⋅1857173173.

It is a cyclic number.

It is not a de Polignac number, because 11221200031 - 2⁷ = 11221199903 is a prime.

It is a super-2 number, since 2×11221200031² (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 = 11221199984 and 11221200020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221200061) 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, 2686270 + ... + 2690443.

It is an arithmetic number, because the mean of its divisors is an integer number (2806644708).

Almost surely, 2^11221200031 is an apocalyptic number.

11221200031 is a deficient number, since it is larger than the sum of its proper divisors (5378801).

11221200031 is an equidigital number, since it uses as much as digits as its factorization.

11221200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378800.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11221200031 its reverse (13000212211), we get a palindrome (24221412242).

The spelling of 11221200031 in words is "eleven billion, two hundred twenty-one million, two hundred thousand, thirty-one".