221320044031 has 2 divisors, whose sum is σ = 221320044032. Its totient is φ = 221320044030.

The previous prime is 221320043999. The next prime is 221320044103. The reversal of 221320044031 is 130440023122.

Together with next prime (221320044103) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221320044031 - 2⁵ = 221320043999 is a prime.

It is a super-2 number, since 2×221320044031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221320043993 and 221320044011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221320044131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110660022015 + 110660022016.

It is an arithmetic number, because the mean of its divisors is an integer number (110660022016).

Almost surely, 2^221320044031 is an apocalyptic number.

221320044031 is a deficient number, since it is larger than the sum of its proper divisors (1).

221320044031 is an equidigital number, since it uses as much as digits as its factorization.

221320044031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 221320044031 its reverse (130440023122), we get a palindrome (351760067153).

The spelling of 221320044031 in words is "two hundred twenty-one billion, three hundred twenty million, forty-four thousand, thirty-one".