111021121120123 has 2 divisors, whose sum is σ = 111021121120124. Its totient is φ = 111021121120122.

The previous prime is 111021121120067. The next prime is 111021121120127. The reversal of 111021121120123 is 321021121120111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111021121120123 - 2²¹ = 111021119022971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111021121120123.

It is not a weakly prime, because it can be changed into another prime (111021121120127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510560560061 + 55510560560062.

It is an arithmetic number, because the mean of its divisors is an integer number (55510560560062).

Almost surely, 2^{111021121120123} is an apocalyptic number.

111021121120123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021121120123 is an equidigital number, since it uses as much as digits as its factorization.

111021121120123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 111021121120123 its reverse (321021121120111), we get a palindrome (432042242240234).

The spelling of 111021121120123 in words is "one hundred eleven trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-three".