1121012020181 has 2 divisors, whose sum is σ = 1121012020182. Its totient is φ = 1121012020180.

The previous prime is 1121012020169. The next prime is 1121012020207. The reversal of 1121012020181 is 1810202101211.

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., 1052606233156 + 68405787025 = 1025966^2 + 261545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121012020181 - 2¹⁸ = 1121011758037 is a prime.

It is a super-2 number, since 2×1121012020181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121012020151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560506010090 + 560506010091.

It is an arithmetic number, because the mean of its divisors is an integer number (560506010091).

Almost surely, 2^{1121012020181} is an apocalyptic number.

It is an amenable number.

1121012020181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121012020181 is an equidigital number, since it uses as much as digits as its factorization.

1121012020181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 1121012020181 its reverse (1810202101211), we get a palindrome (2931214121392).

The spelling of 1121012020181 in words is "one trillion, one hundred twenty-one billion, twelve million, twenty thousand, one hundred eighty-one".