1111123120501 has 2 divisors, whose sum is σ = 1111123120502. Its totient is φ = 1111123120500.

The previous prime is 1111123120477. The next prime is 1111123120511. The reversal of 1111123120501 is 1050213211111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 921398411025 + 189724709476 = 959895^2 + 435574^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111123120501 - 2⁹ = 1111123119989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111123120511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555561560250 + 555561560251.

It is an arithmetic number, because the mean of its divisors is an integer number (555561560251).

Almost surely, 2^{1111123120501} is an apocalyptic number.

It is an amenable number.

1111123120501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111123120501 is an equidigital number, since it uses as much as digits as its factorization.

1111123120501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 1111123120501 its reverse (1050213211111), we get a palindrome (2161336331612).

The spelling of 1111123120501 in words is "one trillion, one hundred eleven billion, one hundred twenty-three million, one hundred twenty thousand, five hundred one".