11111242061 has 2 divisors, whose sum is σ = 11111242062. Its totient is φ = 11111242060.

The previous prime is 11111242031. The next prime is 11111242067. The reversal of 11111242061 is 16024211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10843265161 + 267976900 = 104131^2 + 16370^2 .

It is an emirp because it is prime and its reverse (16024211111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111242061 - 2²⁶ = 11044133197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111242067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555621030 + 5555621031.

It is an arithmetic number, because the mean of its divisors is an integer number (5555621031).

Almost surely, 2^11111242061 is an apocalyptic number.

It is an amenable number.

11111242061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111242061 is an equidigital number, since it uses as much as digits as its factorization.

11111242061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 11111242061 its reverse (16024211111), we get a palindrome (27135453172).

The spelling of 11111242061 in words is "eleven billion, one hundred eleven million, two hundred forty-two thousand, sixty-one".