1210022002121 has 2 divisors, whose sum is σ = 1210022002122. Its totient is φ = 1210022002120.

The previous prime is 1210022002117. The next prime is 1210022002139. The reversal of 1210022002121 is 1212002200121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1182775878025 + 27246124096 = 1087555^2 + 165064^2 .

It is an emirp because it is prime and its reverse (1212002200121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210022002121 - 2² = 1210022002117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210022002096 and 1210022002105.

It is not a weakly prime, because it can be changed into another prime (1210022002151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605011001060 + 605011001061.

It is an arithmetic number, because the mean of its divisors is an integer number (605011001061).

Almost surely, 2^{1210022002121} is an apocalyptic number.

It is an amenable number.

1210022002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210022002121 is an equidigital number, since it uses as much as digits as its factorization.

1210022002121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1210022002121 its reverse (1212002200121), we get a palindrome (2422024202242).

The spelling of 1210022002121 in words is "one trillion, two hundred ten billion, twenty-two million, two thousand, one hundred twenty-one".