221332221031 has 4 divisors (see below), whose sum is σ = 221414229000. Its totient is φ = 221250213064.

The previous prime is 221332221013. The next prime is 221332221041. The reversal of 221332221031 is 130122233122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221332221031 - 2⁵ = 221332220999 is a prime.

It is a super-2 number, since 2×221332221031² (a number of 23 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 = 221332220993 and 221332221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221332221001) 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, 40999936 + ... + 41005333.

It is an arithmetic number, because the mean of its divisors is an integer number (55353557250).

Almost surely, 2^221332221031 is an apocalyptic number.

221332221031 is a deficient number, since it is larger than the sum of its proper divisors (82007969).

221332221031 is an equidigital number, since it uses as much as digits as its factorization.

221332221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82007968.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221332221031 its reverse (130122233122), we get a palindrome (351454454153).

The spelling of 221332221031 in words is "two hundred twenty-one billion, three hundred thirty-two million, two hundred twenty-one thousand, thirty-one".