1212001021213 has 2 divisors, whose sum is σ = 1212001021214. Its totient is φ = 1212001021212.

The previous prime is 1212001021163. The next prime is 1212001021289. The reversal of 1212001021213 is 3121201002121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630012075289 + 581988945924 = 793733^2 + 762882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212001021213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212001021013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606000510606 + 606000510607.

It is an arithmetic number, because the mean of its divisors is an integer number (606000510607).

Almost surely, 2^{1212001021213} is an apocalyptic number.

It is an amenable number.

1212001021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212001021213 is an equidigital number, since it uses as much as digits as its factorization.

1212001021213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1212001021213 its reverse (3121201002121), we get a palindrome (4333202023334).

The spelling of 1212001021213 in words is "one trillion, two hundred twelve billion, one million, twenty-one thousand, two hundred thirteen".