121020000222221 has 2 divisors, whose sum is σ = 121020000222222. Its totient is φ = 121020000222220.

The previous prime is 121020000222151. The next prime is 121020000222257. The reversal of 121020000222221 is 122222000020121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94924392697225 + 26095607524996 = 9742915^2 + 5108386^2 .

It is an emirp because it is prime and its reverse (122222000020121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121020000222221 - 2³⁸ = 120745122315277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121020000222221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121020000228221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510000111110 + 60510000111111.

It is an arithmetic number, because the mean of its divisors is an integer number (60510000111111).

Almost surely, 2^{121020000222221} is an apocalyptic number.

It is an amenable number.

121020000222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020000222221 is an equidigital number, since it uses as much as digits as its factorization.

121020000222221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121020000222221 its reverse (122222000020121), we get a palindrome (243242000242342).

The spelling of 121020000222221 in words is "one hundred twenty-one trillion, twenty billion, two hundred twenty-two thousand, two hundred twenty-one".