1611061015121 has 2 divisors, whose sum is σ = 1611061015122. Its totient is φ = 1611061015120.

The previous prime is 1611061015073. The next prime is 1611061015129. The reversal of 1611061015121 is 1215101601161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1028794347025 + 582266668096 = 1014295^2 + 763064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611061015121 - 2¹⁴ = 1611060998737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1611061015129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805530507560 + 805530507561.

It is an arithmetic number, because the mean of its divisors is an integer number (805530507561).

Almost surely, 2^{1611061015121} is an apocalyptic number.

It is an amenable number.

1611061015121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611061015121 is an equidigital number, since it uses as much as digits as its factorization.

1611061015121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 26.

Adding to 1611061015121 its reverse (1215101601161), we get a palindrome (2826162616282).

The spelling of 1611061015121 in words is "one trillion, six hundred eleven billion, sixty-one million, fifteen thousand, one hundred twenty-one".