221220330111031 has 8 divisors (see below), whose sum is σ = 228357387743744. Its totient is φ = 214083329850360.

The previous prime is 221220330110999. The next prime is 221220330111041. The reversal of 221220330111031 is 130111033022122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221220330111031 - 2⁵ = 221220330110999 is a prime.

It is a super-2 number, since 2×221220330111031² (a number of 29 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 = 221220330110993 and 221220330111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220330111041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6437661 + ... + 21997366.

It is an arithmetic number, because the mean of its divisors is an integer number (28544673467968).

Almost surely, 2^{221220330111031} is an apocalyptic number.

221220330111031 is a deficient number, since it is larger than the sum of its proper divisors (7137057632713).

221220330111031 is a wasteful number, since it uses less digits than its factorization.

221220330111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28686021.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 221220330111031 its reverse (130111033022122), we get a palindrome (351331363133153).

The spelling of 221220330111031 in words is "two hundred twenty-one trillion, two hundred twenty billion, three hundred thirty million, one hundred eleven thousand, thirty-one".