1221212002133 has 2 divisors, whose sum is σ = 1221212002134. Its totient is φ = 1221212002132.

The previous prime is 1221212002103. The next prime is 1221212002141. The reversal of 1221212002133 is 3312002121221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198284894244 + 22927107889 = 1094662^2 + 151417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221212002133 - 2¹⁶ = 1221211936597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221212002103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610606001066 + 610606001067.

It is an arithmetic number, because the mean of its divisors is an integer number (610606001067).

Almost surely, 2^{1221212002133} is an apocalyptic number.

It is an amenable number.

1221212002133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221212002133 is an equidigital number, since it uses as much as digits as its factorization.

1221212002133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1221212002133 its reverse (3312002121221), we get a palindrome (4533214123354).

The spelling of 1221212002133 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, two thousand, one hundred thirty-three".