1112212112261 has 2 divisors, whose sum is σ = 1112212112262. Its totient is φ = 1112212112260.

The previous prime is 1112212112243. The next prime is 1112212112269. The reversal of 1112212112261 is 1622112122111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1097329576225 + 14882536036 = 1047535^2 + 121994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112212112261 - 2²⁶ = 1112145003397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112212112269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556106056130 + 556106056131.

It is an arithmetic number, because the mean of its divisors is an integer number (556106056131).

Almost surely, 2^{1112212112261} is an apocalyptic number.

It is an amenable number.

1112212112261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112212112261 is an equidigital number, since it uses as much as digits as its factorization.

1112212112261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 23.

Adding to 1112212112261 its reverse (1622112122111), we get a palindrome (2734324234372).

The spelling of 1112212112261 in words is "one trillion, one hundred twelve billion, two hundred twelve million, one hundred twelve thousand, two hundred sixty-one".