111012221212157 has 2 divisors, whose sum is σ = 111012221212158. Its totient is φ = 111012221212156.

The previous prime is 111012221212117. The next prime is 111012221212289. The reversal of 111012221212157 is 751212122210111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95774916769156 + 15237304443001 = 9786466^2 + 3903499^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012221212157 - 2²⁶ = 111012154103293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111012221212117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506110606078 + 55506110606079.

It is an arithmetic number, because the mean of its divisors is an integer number (55506110606079).

Almost surely, 2^{111012221212157} is an apocalyptic number.

It is an amenable number.

111012221212157 is a deficient number, since it is larger than the sum of its proper divisors (1).

111012221212157 is an equidigital number, since it uses as much as digits as its factorization.

111012221212157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 29.

Adding to 111012221212157 its reverse (751212122210111), we get a palindrome (862224343422268).

The spelling of 111012221212157 in words is "one hundred eleven trillion, twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred fifty-seven".