112122121261 has 2 divisors, whose sum is σ = 112122121262. Its totient is φ = 112122121260.

The previous prime is 112122121183. The next prime is 112122121379. The reversal of 112122121261 is 162121221211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56593555236 + 55528566025 = 237894^2 + 235645^2 .

It is an emirp because it is prime and its reverse (162121221211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 112122121261 - 2⁹ = 112122120749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112122181261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56061060630 + 56061060631.

It is an arithmetic number, because the mean of its divisors is an integer number (56061060631).

Almost surely, 2^112122121261 is an apocalyptic number.

It is an amenable number.

112122121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

112122121261 is an equidigital number, since it uses as much as digits as its factorization.

112122121261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 22.

Adding to 112122121261 its reverse (162121221211), we get a palindrome (274243342472).

The spelling of 112122121261 in words is "one hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred sixty-one".