121001222200021 has 2 divisors, whose sum is σ = 121001222200022. Its totient is φ = 121001222200020.

The previous prime is 121001222200013. The next prime is 121001222200063. The reversal of 121001222200021 is 120002222100121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103919450539921 + 17081771660100 = 10194089^2 + 4133010^2 .

It is a cyclic number.

It is not a de Polignac number, because 121001222200021 - 2³ = 121001222200013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121001222199968 and 121001222200004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121001222200121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500611100010 + 60500611100011.

It is an arithmetic number, because the mean of its divisors is an integer number (60500611100011).

Almost surely, 2^{121001222200021} is an apocalyptic number.

It is an amenable number.

121001222200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001222200021 is an equidigital number, since it uses as much as digits as its factorization.

121001222200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121001222200021 its reverse (120002222100121), we get a palindrome (241003444300142).

The spelling of 121001222200021 in words is "one hundred twenty-one trillion, one billion, two hundred twenty-two million, two hundred thousand, twenty-one".