1020221010121 has 2 divisors, whose sum is σ = 1020221010122. Its totient is φ = 1020221010120.

The previous prime is 1020221010097. The next prime is 1020221010161. The reversal of 1020221010121 is 1210101220201.

1020221010121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 924222663225 + 95998346896 = 961365^2 + 309836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020221010121 - 2¹⁷ = 1020220879049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020221010161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510110505060 + 510110505061.

It is an arithmetic number, because the mean of its divisors is an integer number (510110505061).

Almost surely, 2^{1020221010121} is an apocalyptic number.

It is an amenable number.

1020221010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020221010121 is an equidigital number, since it uses as much as digits as its factorization.

1020221010121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1020221010121 its reverse (1210101220201), we get a palindrome (2230322230322).

The spelling of 1020221010121 in words is "one trillion, twenty billion, two hundred twenty-one million, ten thousand, one hundred twenty-one".