11112211157 has 2 divisors, whose sum is σ = 11112211158. Its totient is φ = 11112211156.

The previous prime is 11112211141. The next prime is 11112211189. The reversal of 11112211157 is 75111221111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10674815761 + 437395396 = 103319^2 + 20914^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112211157 - 2⁴ = 11112211141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112211127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556105578 + 5556105579.

It is an arithmetic number, because the mean of its divisors is an integer number (5556105579).

Almost surely, 2^11112211157 is an apocalyptic number.

It is an amenable number.

11112211157 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112211157 is an equidigital number, since it uses as much as digits as its factorization.

11112211157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 140, while the sum is 23.

Adding to 11112211157 its reverse (75111221111), we get a palindrome (86223432268).

The spelling of 11112211157 in words is "eleven billion, one hundred twelve million, two hundred eleven thousand, one hundred fifty-seven".