1125510022081 has 2 divisors, whose sum is σ = 1125510022082. Its totient is φ = 1125510022080.

The previous prime is 1125510022067. The next prime is 1125510022123. The reversal of 1125510022081 is 1802200155211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 832838760000 + 292671262081 = 912600^2 + 540991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125510022081 - 2¹⁹ = 1125509497793 is a prime.

It is a super-2 number, since 2×1125510022081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1125510022031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562755011040 + 562755011041.

It is an arithmetic number, because the mean of its divisors is an integer number (562755011041).

Almost surely, 2^{1125510022081} is an apocalyptic number.

It is an amenable number.

1125510022081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125510022081 is an equidigital number, since it uses as much as digits as its factorization.

1125510022081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 28.

Adding to 1125510022081 its reverse (1802200155211), we get a palindrome (2927710177292).

The spelling of 1125510022081 in words is "one trillion, one hundred twenty-five billion, five hundred ten million, twenty-two thousand, eighty-one".