111203144244421 has 2 divisors, whose sum is σ = 111203144244422. Its totient is φ = 111203144244420.

The previous prime is 111203144244407. The next prime is 111203144244473. The reversal of 111203144244421 is 124442441302111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111173932649025 + 29211595396 = 10543905^2 + 170914^2 .

It is an emirp because it is prime and its reverse (124442441302111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111203144244421 - 2⁹ = 111203144243909 is a prime.

It is a super-2 number, since 2×111203144244421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111203144244121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55601572122210 + 55601572122211.

It is an arithmetic number, because the mean of its divisors is an integer number (55601572122211).

Almost surely, 2^{111203144244421} is an apocalyptic number.

It is an amenable number.

111203144244421 is a deficient number, since it is larger than the sum of its proper divisors (1).

111203144244421 is an equidigital number, since it uses as much as digits as its factorization.

111203144244421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 34.

Adding to 111203144244421 its reverse (124442441302111), we get a palindrome (235645585546532).

The spelling of 111203144244421 in words is "one hundred eleven trillion, two hundred three billion, one hundred forty-four million, two hundred forty-four thousand, four hundred twenty-one".