1111488121 has 2 divisors, whose sum is σ = 1111488122. Its totient is φ = 1111488120.

The previous prime is 1111488113. The next prime is 1111488143. The reversal of 1111488121 is 1218841111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1032722496 + 78765625 = 32136^2 + 8875^2 .

It is an emirp because it is prime and its reverse (1218841111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111488121 - 2³ = 1111488113 is a prime.

It is a super-2 number, since 2×1111488121² = 2470811686248221282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1111488121.

It is not a weakly prime, because it can be changed into another prime (1111488421) 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, 555744060 + 555744061.

It is an arithmetic number, because the mean of its divisors is an integer number (555744061).

Almost surely, 2^1111488121 is an apocalyptic number.

It is an amenable number.

1111488121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111488121 is an equidigital number, since it uses as much as digits as its factorization.

1111488121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 512, while the sum is 28.

The square root of 1111488121 is about 33338.9880020375. The cubic root of 1111488121 is about 1035.8613011424.

It can be divided in two parts, 11114 and 88121, that added together give a triangular number (99235 = T₄₄₅).

The spelling of 1111488121 in words is "one billion, one hundred eleven million, four hundred eighty-eight thousand, one hundred twenty-one".