121022010210221 has 2 divisors, whose sum is σ = 121022010210222. Its totient is φ = 121022010210220.

The previous prime is 121022010210187. The next prime is 121022010210281. The reversal of 121022010210221 is 122012010220121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103608173016100 + 17413837194121 = 10178810^2 + 4172989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121022010210221 is a prime.

It is a super-4 number, since 4×121022010210221⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121022010210221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121022010210281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511005105110 + 60511005105111.

It is an arithmetic number, because the mean of its divisors is an integer number (60511005105111).

Almost surely, 2^{121022010210221} is an apocalyptic number.

It is an amenable number.

121022010210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022010210221 is an equidigital number, since it uses as much as digits as its factorization.

121022010210221 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 17.

Adding to 121022010210221 its reverse (122012010220121), we get a palindrome (243034020430342).

The spelling of 121022010210221 in words is "one hundred twenty-one trillion, twenty-two billion, ten million, two hundred ten thousand, two hundred twenty-one".