221031011233 has 2 divisors, whose sum is σ = 221031011234. Its totient is φ = 221031011232.

The previous prime is 221031011221. The next prime is 221031011249. The reversal of 221031011233 is 332110130122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205623250849 + 15407760384 = 453457^2 + 124128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221031011233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221031011233.

It is not a weakly prime, because it can be changed into another prime (221031011263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110515505616 + 110515505617.

It is an arithmetic number, because the mean of its divisors is an integer number (110515505617).

Almost surely, 2^221031011233 is an apocalyptic number.

It is an amenable number.

221031011233 is a deficient number, since it is larger than the sum of its proper divisors (1).

221031011233 is an equidigital number, since it uses as much as digits as its factorization.

221031011233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221031011233 its reverse (332110130122), we get a palindrome (553141141355).

The spelling of 221031011233 in words is "two hundred twenty-one billion, thirty-one million, eleven thousand, two hundred thirty-three".