22031321031 has 8 divisors (see below), whose sum is σ = 32638994160. Its totient is φ = 14687547336.

The previous prime is 22031321027. The next prime is 22031321051. The reversal of 22031321031 is 13012313022.

It is not a de Polignac number, because 22031321031 - 2² = 22031321027 is a prime.

It is a super-2 number, since 2×22031321031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22031320995 and 22031321013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031321051) 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 7 ways as a sum of consecutive naturals, for example, 407987400 + ... + 407987453.

It is an arithmetic number, because the mean of its divisors is an integer number (4079874270).

Almost surely, 2^22031321031 is an apocalyptic number.

22031321031 is a deficient number, since it is larger than the sum of its proper divisors (10607673129).

22031321031 is an equidigital number, since it uses as much as digits as its factorization.

22031321031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815974862 (or 815974856 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 22031321031 its reverse (13012313022), we get a palindrome (35043634053).

The spelling of 22031321031 in words is "twenty-two billion, thirty-one million, three hundred twenty-one thousand, thirty-one".