11122112021261 has 2 divisors, whose sum is σ = 11122112021262. Its totient is φ = 11122112021260.

The previous prime is 11122112021239. The next prime is 11122112021297. The reversal of 11122112021261 is 16212021122111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5817985202500 + 5304126818761 = 2412050^2 + 2303069^2 .

It is an emirp because it is prime and its reverse (16212021122111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11122112021261 - 2¹⁰ = 11122112020237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122112021201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561056010630 + 5561056010631.

It is an arithmetic number, because the mean of its divisors is an integer number (5561056010631).

Almost surely, 2^{11122112021261} is an apocalyptic number.

It is an amenable number.

11122112021261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122112021261 is an equidigital number, since it uses as much as digits as its factorization.

11122112021261 is an evil number, because the sum of its binary digits is even.

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

Adding to 11122112021261 its reverse (16212021122111), we get a palindrome (27334133143372).

The spelling of 11122112021261 in words is "eleven trillion, one hundred twenty-two billion, one hundred twelve million, twenty-one thousand, two hundred sixty-one".