1221012002213 has 2 divisors, whose sum is σ = 1221012002214. Its totient is φ = 1221012002212.

The previous prime is 1221012002167. The next prime is 1221012002281. The reversal of 1221012002213 is 3122002101221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214311433764 + 6700568449 = 1101958^2 + 81857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221012002213 - 2¹⁰ = 1221012001189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221012002191 and 1221012002200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221012001213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610506001106 + 610506001107.

It is an arithmetic number, because the mean of its divisors is an integer number (610506001107).

Almost surely, 2^{1221012002213} is an apocalyptic number.

It is an amenable number.

1221012002213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221012002213 is an equidigital number, since it uses as much as digits as its factorization.

1221012002213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221012002213 its reverse (3122002101221), we get a palindrome (4343014103434).

The spelling of 1221012002213 in words is "one trillion, two hundred twenty-one billion, twelve million, two thousand, two hundred thirteen".