2122111121161 has 2 divisors, whose sum is σ = 2122111121162. Its totient is φ = 2122111121160.

The previous prime is 2122111121101. The next prime is 2122111121213. The reversal of 2122111121161 is 1611211112212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1888755462400 + 233355658761 = 1374320^2 + 483069^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122111121161 - 2¹³ = 2122111112969 is a prime.

It is a super-2 number, since 2×2122111121161² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2122111121101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061055560580 + 1061055560581.

It is an arithmetic number, because the mean of its divisors is an integer number (1061055560581).

Almost surely, 2^{2122111121161} is an apocalyptic number.

It is an amenable number.

2122111121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122111121161 is an equidigital number, since it uses as much as digits as its factorization.

2122111121161 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 2122111121161 its reverse (1611211112212), we get a palindrome (3733322233373).

The spelling of 2122111121161 in words is "two trillion, one hundred twenty-two billion, one hundred eleven million, one hundred twenty-one thousand, one hundred sixty-one".