1210002202121 has 2 divisors, whose sum is σ = 1210002202122. Its totient is φ = 1210002202120.

The previous prime is 1210002202117. The next prime is 1210002202207. The reversal of 1210002202121 is 1212022000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 752165925625 + 457836276496 = 867275^2 + 676636^2 .

It is an emirp because it is prime and its reverse (1212022000121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210002202121 - 2² = 1210002202117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210002202096 and 1210002202105.

It is not a weakly prime, because it can be changed into another prime (1210002202021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605001101060 + 605001101061.

It is an arithmetic number, because the mean of its divisors is an integer number (605001101061).

Almost surely, 2^{1210002202121} is an apocalyptic number.

It is an amenable number.

1210002202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210002202121 is an equidigital number, since it uses as much as digits as its factorization.

1210002202121 is an evil number, because the sum of its binary digits is even.

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

Adding to 1210002202121 its reverse (1212022000121), we get a palindrome (2422024202242).

The spelling of 1210002202121 in words is "one trillion, two hundred ten billion, two million, two hundred two thousand, one hundred twenty-one".