111400121221 has 2 divisors, whose sum is σ = 111400121222. Its totient is φ = 111400121220.

The previous prime is 111400121179. The next prime is 111400121257. The reversal of 111400121221 is 122121004111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94549485121 + 16850636100 = 307489^2 + 129810^2 .

It is a cyclic number.

It is not a de Polignac number, because 111400121221 - 2⁷ = 111400121093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111400121195 and 111400121204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111400122221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55700060610 + 55700060611.

It is an arithmetic number, because the mean of its divisors is an integer number (55700060611).

Almost surely, 2^111400121221 is an apocalyptic number.

It is an amenable number.

111400121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111400121221 is an equidigital number, since it uses as much as digits as its factorization.

111400121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111400121221 its reverse (122121004111), we get a palindrome (233521125332).

The spelling of 111400121221 in words is "one hundred eleven billion, four hundred million, one hundred twenty-one thousand, two hundred twenty-one".