1212001110121 has 2 divisors, whose sum is σ = 1212001110122. Its totient is φ = 1212001110120.

The previous prime is 1212001110119. The next prime is 1212001110149. The reversal of 1212001110121 is 1210111002121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1062835221721 + 149165888400 = 1030939^2 + 386220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212001110121 - 2¹ = 1212001110119 is a prime.

Together with 1212001110119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1212001110181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606000555060 + 606000555061.

It is an arithmetic number, because the mean of its divisors is an integer number (606000555061).

Almost surely, 2^{1212001110121} is an apocalyptic number.

It is an amenable number.

1212001110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212001110121 is an equidigital number, since it uses as much as digits as its factorization.

1212001110121 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 13.

Adding to 1212001110121 its reverse (1210111002121), we get a palindrome (2422112112242).

It can be divided in two parts, 121200 and 1110121, that added together give a palindrome (1231321).

The spelling of 1212001110121 in words is "one trillion, two hundred twelve billion, one million, one hundred ten thousand, one hundred twenty-one".