1002201010121 has 2 divisors, whose sum is σ = 1002201010122. Its totient is φ = 1002201010120.

The previous prime is 1002201010099. The next prime is 1002201010127. The reversal of 1002201010121 is 1210101022001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 962135383225 + 40065626896 = 980885^2 + 200164^2 .

It is an emirp because it is prime and its reverse (1210101022001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1002201010121 - 2³⁴ = 985021140937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002201010127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501100505060 + 501100505061.

It is an arithmetic number, because the mean of its divisors is an integer number (501100505061).

Almost surely, 2^{1002201010121} is an apocalyptic number.

It is an amenable number.

1002201010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002201010121 is an equidigital number, since it uses as much as digits as its factorization.

1002201010121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1002201010121 its reverse (1210101022001), we get a palindrome (2212302032122).

The spelling of 1002201010121 in words is "one trillion, two billion, two hundred one million, ten thousand, one hundred twenty-one".