121012211112161 has 2 divisors, whose sum is σ = 121012211112162. Its totient is φ = 121012211112160.

The previous prime is 121012211112071. The next prime is 121012211112187. The reversal of 121012211112161 is 161211112210121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114117280439761 + 6894930672400 = 10682569^2 + 2625820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121012211112161 is a prime.

It is not a weakly prime, because it can be changed into another prime (121012211112761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506105556080 + 60506105556081.

It is an arithmetic number, because the mean of its divisors is an integer number (60506105556081).

Almost surely, 2^{121012211112161} is an apocalyptic number.

It is an amenable number.

121012211112161 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012211112161 is an equidigital number, since it uses as much as digits as its factorization.

121012211112161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 23.

Adding to 121012211112161 its reverse (161211112210121), we get a palindrome (282223323322282).

The spelling of 121012211112161 in words is "one hundred twenty-one trillion, twelve billion, two hundred eleven million, one hundred twelve thousand, one hundred sixty-one".