12222002111261 has 2 divisors, whose sum is σ = 12222002111262. Its totient is φ = 12222002111260.

The previous prime is 12222002111239. The next prime is 12222002111327. The reversal of 12222002111261 is 16211120022221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9010917308761 + 3211084802500 = 3001819^2 + 1791950^2 .

It is an emirp because it is prime and its reverse (16211120022221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12222002111261 - 2¹⁴ = 12222002094877 is a prime.

It is a super-3 number, since 3×12222002111261³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222002161261) 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, 6111001055630 + 6111001055631.

It is an arithmetic number, because the mean of its divisors is an integer number (6111001055631).

Almost surely, 2^{12222002111261} is an apocalyptic number.

It is an amenable number.

12222002111261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222002111261 is an equidigital number, since it uses as much as digits as its factorization.

12222002111261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 12222002111261 its reverse (16211120022221), we get a palindrome (28433122133482).

The spelling of 12222002111261 in words is "twelve trillion, two hundred twenty-two billion, two million, one hundred eleven thousand, two hundred sixty-one".