121232242232161 has 2 divisors, whose sum is σ = 121232242232162. Its totient is φ = 121232242232160.

The previous prime is 121232242232093. The next prime is 121232242232261. The reversal of 121232242232161 is 161232242232121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109661087542561 + 11571154689600 = 10471919^2 + 3401640^2 .

It is an emirp because it is prime and its reverse (161232242232121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121232242232161 is a prime.

It is a super-2 number, since 2×121232242232161² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121232242232261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60616121116080 + 60616121116081.

It is an arithmetic number, because the mean of its divisors is an integer number (60616121116081).

Almost surely, 2^{121232242232161} is an apocalyptic number.

It is an amenable number.

121232242232161 is a deficient number, since it is larger than the sum of its proper divisors (1).

121232242232161 is an equidigital number, since it uses as much as digits as its factorization.

121232242232161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 34.

Adding to 121232242232161 its reverse (161232242232121), we get a palindrome (282464484464282).

The spelling of 121232242232161 in words is "one hundred twenty-one trillion, two hundred thirty-two billion, two hundred forty-two million, two hundred thirty-two thousand, one hundred sixty-one".