1121161212121 has 2 divisors, whose sum is σ = 1121161212122. Its totient is φ = 1121161212120.

The previous prime is 1121161212107. The next prime is 1121161212217. The reversal of 1121161212121 is 1212121611211.

It is a m-pointer prime, because the next prime (1121161212217) can be obtained adding 1121161212121 to its product of digits (96).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972600302025 + 148560910096 = 986205^2 + 385436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121161212121 - 2⁵ = 1121161212089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121161212092 and 1121161212101.

It is not a weakly prime, because it can be changed into another prime (1121161213121) 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, 560580606060 + 560580606061.

It is an arithmetic number, because the mean of its divisors is an integer number (560580606061).

Almost surely, 2^{1121161212121} is an apocalyptic number.

It is an amenable number.

1121161212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121161212121 is an equidigital number, since it uses as much as digits as its factorization.

1121161212121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 22.

Adding to 1121161212121 its reverse (1212121611211), we get a palindrome (2333282823332).

The spelling of 1121161212121 in words is "one trillion, one hundred twenty-one billion, one hundred sixty-one million, two hundred twelve thousand, one hundred twenty-one".