111200401121 has 2 divisors, whose sum is σ = 111200401122. Its totient is φ = 111200401120.

The previous prime is 111200401079. The next prime is 111200401189. The reversal of 111200401121 is 121104002111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104740260496 + 6460140625 = 323636^2 + 80375^2 .

It is a cyclic number.

It is not a de Polignac number, because 111200401121 - 2⁶ = 111200401057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111200401096 and 111200401105.

It is not a weakly prime, because it can be changed into another prime (111200403121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600200560 + 55600200561.

It is an arithmetic number, because the mean of its divisors is an integer number (55600200561).

Almost surely, 2^111200401121 is an apocalyptic number.

It is an amenable number.

111200401121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111200401121 is an equidigital number, since it uses as much as digits as its factorization.

111200401121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111200401121 its reverse (121104002111), we get a palindrome (232304403232).

The spelling of 111200401121 in words is "one hundred eleven billion, two hundred million, four hundred one thousand, one hundred twenty-one".