111203013221 has 2 divisors, whose sum is σ = 111203013222. Its totient is φ = 111203013220.

The previous prime is 111203013203. The next prime is 111203013263. The reversal of 111203013221 is 122310302111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85036392100 + 26166621121 = 291610^2 + 161761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111203013221 is a prime.

It is a super-2 number, since 2×111203013221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111203013221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111203003221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55601506610 + 55601506611.

It is an arithmetic number, because the mean of its divisors is an integer number (55601506611).

Almost surely, 2^111203013221 is an apocalyptic number.

It is an amenable number.

111203013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111203013221 is an equidigital number, since it uses as much as digits as its factorization.

111203013221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 111203013221 its reverse (122310302111), we get a palindrome (233513315332).

The spelling of 111203013221 in words is "one hundred eleven billion, two hundred three million, thirteen thousand, two hundred twenty-one".