221112011220157 has 2 divisors, whose sum is σ = 221112011220158. Its totient is φ = 221112011220156.

The previous prime is 221112011220071. The next prime is 221112011220197. The reversal of 221112011220157 is 751022110211122.

It is a happy number.

221112011220157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119277392973561 + 101834618246596 = 10921419^2 + 10091314^2 .

It is a cyclic number.

It is not a de Polignac number, because 221112011220157 - 2⁷ = 221112011220029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221112011220197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556005610078 + 110556005610079.

It is an arithmetic number, because the mean of its divisors is an integer number (110556005610079).

Almost surely, 2^{221112011220157} is an apocalyptic number.

It is an amenable number.

221112011220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112011220157 is an equidigital number, since it uses as much as digits as its factorization.

221112011220157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 28.

Adding to 221112011220157 its reverse (751022110211122), we get a palindrome (972134121431279).

The spelling of 221112011220157 in words is "two hundred twenty-one trillion, one hundred twelve billion, eleven million, two hundred twenty thousand, one hundred fifty-seven".