1123211111051 has 2 divisors, whose sum is σ = 1123211111052. Its totient is φ = 1123211111050.

The previous prime is 1123211110981. The next prime is 1123211111129. The reversal of 1123211111051 is 1501111123211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123211111051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123211111251) 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, 561605555525 + 561605555526.

It is an arithmetic number, because the mean of its divisors is an integer number (561605555526).

Almost surely, 2^{1123211111051} is an apocalyptic number.

1123211111051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123211111051 is an equidigital number, since it uses as much as digits as its factorization.

1123211111051 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 20.

Adding to 1123211111051 its reverse (1501111123211), we get a palindrome (2624322234262).

The spelling of 1123211111051 in words is "one trillion, one hundred twenty-three billion, two hundred eleven million, one hundred eleven thousand, fifty-one".