1212200113321 has 2 divisors, whose sum is σ = 1212200113322. Its totient is φ = 1212200113320.

The previous prime is 1212200113301. The next prime is 1212200113351. The reversal of 1212200113321 is 1233110022121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1154088261225 + 58111852096 = 1074285^2 + 241064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212200113321 is a prime.

It is a super-2 number, since 2×1212200113321² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212200113301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606100056660 + 606100056661.

It is an arithmetic number, because the mean of its divisors is an integer number (606100056661).

Almost surely, 2^{1212200113321} is an apocalyptic number.

It is an amenable number.

1212200113321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212200113321 is an equidigital number, since it uses as much as digits as its factorization.

1212200113321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1212200113321 its reverse (1233110022121), we get a palindrome (2445310135442).

The spelling of 1212200113321 in words is "one trillion, two hundred twelve billion, two hundred million, one hundred thirteen thousand, three hundred twenty-one".