111203223111121 has 2 divisors, whose sum is σ = 111203223111122. Its totient is φ = 111203223111120.

The previous prime is 111203223111077. The next prime is 111203223111157. The reversal of 111203223111121 is 121111322302111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102534255846400 + 8668967264721 = 10125920^2 + 2944311^2 .

It is an emirp because it is prime and its reverse (121111322302111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111203223111121 - 2²³ = 111203214722513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111203223111092 and 111203223111101.

It is not a weakly prime, because it can be changed into another prime (111203223141121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55601611555560 + 55601611555561.

It is an arithmetic number, because the mean of its divisors is an integer number (55601611555561).

Almost surely, 2^{111203223111121} is an apocalyptic number.

It is an amenable number.

111203223111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111203223111121 is an equidigital number, since it uses as much as digits as its factorization.

111203223111121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 111203223111121 its reverse (121111322302111), we get a palindrome (232314545413232).

The spelling of 111203223111121 in words is "one hundred eleven trillion, two hundred three billion, two hundred twenty-three million, one hundred eleven thousand, one hundred twenty-one".