121002021221161 has 2 divisors, whose sum is σ = 121002021221162. Its totient is φ = 121002021221160.

The previous prime is 121002021221149. The next prime is 121002021221219. The reversal of 121002021221161 is 161122120200121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94913013313561 + 26089007907600 = 9742331^2 + 5107740^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002021221161 - 2⁹ = 121002021220649 is a prime.

It is not a weakly prime, because it can be changed into another prime (121002021222161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501010610580 + 60501010610581.

It is an arithmetic number, because the mean of its divisors is an integer number (60501010610581).

Almost surely, 2^{121002021221161} is an apocalyptic number.

It is an amenable number.

121002021221161 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002021221161 is an equidigital number, since it uses as much as digits as its factorization.

121002021221161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 121002021221161 its reverse (161122120200121), we get a palindrome (282124141421282).

The spelling of 121002021221161 in words is "one hundred twenty-one trillion, two billion, twenty-one million, two hundred twenty-one thousand, one hundred sixty-one".