2222212312261 has 2 divisors, whose sum is σ = 2222212312262. Its totient is φ = 2222212312260.

The previous prime is 2222212312211. The next prime is 2222212312289. The reversal of 2222212312261 is 1622132122222.

It is an a-pointer prime, because the next prime (2222212312289) can be obtained adding 2222212312261 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2067355108900 + 154857203361 = 1437830^2 + 393519^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222212312261 - 2¹³ = 2222212304069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2222212312211) 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, 1111106156130 + 1111106156131.

It is an arithmetic number, because the mean of its divisors is an integer number (1111106156131).

Almost surely, 2^{2222212312261} is an apocalyptic number.

It is an amenable number.

2222212312261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222212312261 is an equidigital number, since it uses as much as digits as its factorization.

2222212312261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

Adding to 2222212312261 its reverse (1622132122222), we get a palindrome (3844344434483).

The spelling of 2222212312261 in words is "two trillion, two hundred twenty-two billion, two hundred twelve million, three hundred twelve thousand, two hundred sixty-one".