10012221220121 has 2 divisors, whose sum is σ = 10012221220122. Its totient is φ = 10012221220120.

The previous prime is 10012221220097. The next prime is 10012221220363. The reversal of 10012221220121 is 12102212221001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6698598067225 + 3313623152896 = 2588165^2 + 1820336^2 .

It is a cyclic number.

It is not a de Polignac number, because 10012221220121 - 2²² = 10012217025817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10012221220121.

It is not a weakly prime, because it can be changed into another prime (10012221226121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5006110610060 + 5006110610061.

It is an arithmetic number, because the mean of its divisors is an integer number (5006110610061).

Almost surely, 2^{10012221220121} is an apocalyptic number.

It is an amenable number.

10012221220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10012221220121 is an equidigital number, since it uses as much as digits as its factorization.

10012221220121 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 10012221220121 its reverse (12102212221001), we get a palindrome (22114433441122).

The spelling of 10012221220121 in words is "ten trillion, twelve billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty-one".