1210120210121 has 2 divisors, whose sum is σ = 1210120210122. Its totient is φ = 1210120210120.

The previous prime is 1210120210109. The next prime is 1210120210133.

1210120210121 is nontrivially palindromic in base 10.

It is a balanced prime because it is at equal distance from previous prime (1210120210109) and next prime (1210120210133).

It can be written as a sum of positive squares in only one way, i.e., 811692883600 + 398427326521 = 900940^2 + 631211^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1210120210121 - 2³⁰ = 1209046468297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210120210096 and 1210120210105.

It is not a weakly prime, because it can be changed into another prime (1210120210151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605060105060 + 605060105061.

It is an arithmetic number, because the mean of its divisors is an integer number (605060105061).

Almost surely, 2^{1210120210121} is an apocalyptic number.

It is an amenable number.

1210120210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210120210121 is an equidigital number, since it uses as much as digits as its factorization.

1210120210121 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 14.

It can be divided in two parts, 1210120 and 210121, that added together give a palindrome (1420241).

The spelling of 1210120210121 in words is "one trillion, two hundred ten billion, one hundred twenty million, two hundred ten thousand, one hundred twenty-one".