1123210120111 has 2 divisors, whose sum is σ = 1123210120112. Its totient is φ = 1123210120110.

The previous prime is 1123210120093. The next prime is 1123210120133. The reversal of 1123210120111 is 1110210123211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123210120111 - 2¹⁵ = 1123210087343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123210120171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561605060055 + 561605060056.

It is an arithmetic number, because the mean of its divisors is an integer number (561605060056).

Almost surely, 2^{1123210120111} is an apocalyptic number.

1123210120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123210120111 is an equidigital number, since it uses as much as digits as its factorization.

1123210120111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1123210120111 its reverse (1110210123211), we get a palindrome (2233420243322).

The spelling of 1123210120111 in words is "one trillion, one hundred twenty-three billion, two hundred ten million, one hundred twenty thousand, one hundred eleven".