11111154102157 has 2 divisors, whose sum is σ = 11111154102158. Its totient is φ = 11111154102156.

The previous prime is 11111154102131. The next prime is 11111154102203. The reversal of 11111154102157 is 75120145111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6028920408996 + 5082233693161 = 2455386^2 + 2254381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111154102157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111154102757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555577051078 + 5555577051079.

It is an arithmetic number, because the mean of its divisors is an integer number (5555577051079).

Almost surely, 2^{11111154102157} is an apocalyptic number.

It is an amenable number.

11111154102157 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111154102157 is an equidigital number, since it uses as much as digits as its factorization.

11111154102157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 31.

Adding to 11111154102157 its reverse (75120145111111), we get a palindrome (86231299213268).

The spelling of 11111154102157 in words is "eleven trillion, one hundred eleven billion, one hundred fifty-four million, one hundred two thousand, one hundred fifty-seven".