1111012018121 has 2 divisors, whose sum is σ = 1111012018122. Its totient is φ = 1111012018120.

The previous prime is 1111012018097. The next prime is 1111012018169. The reversal of 1111012018121 is 1218102101111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 897119642896 + 213892375225 = 947164^2 + 462485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111012018121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111012018093 and 1111012018102.

It is not a weakly prime, because it can be changed into another prime (1111012018021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555506009060 + 555506009061.

It is an arithmetic number, because the mean of its divisors is an integer number (555506009061).

Almost surely, 2^{1111012018121} is an apocalyptic number.

It is an amenable number.

1111012018121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111012018121 is an equidigital number, since it uses as much as digits as its factorization.

1111012018121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 20.

Adding to 1111012018121 its reverse (1218102101111), we get a palindrome (2329114119232).

The spelling of 1111012018121 in words is "one trillion, one hundred eleven billion, twelve million, eighteen thousand, one hundred twenty-one".