22221112157 has 2 divisors, whose sum is σ = 22221112158. Its totient is φ = 22221112156.

The previous prime is 22221112141. The next prime is 22221112231. The reversal of 22221112157 is 75121112222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15037871641 + 7183240516 = 122629^2 + 84754^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221112157 - 2⁴ = 22221112141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221112117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110556078 + 11110556079.

It is an arithmetic number, because the mean of its divisors is an integer number (11110556079).

Almost surely, 2^22221112157 is an apocalyptic number.

It is an amenable number.

22221112157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221112157 is an equidigital number, since it uses as much as digits as its factorization.

22221112157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 26.

Adding to 22221112157 its reverse (75121112222), we get a palindrome (97342224379).

The spelling of 22221112157 in words is "twenty-two billion, two hundred twenty-one million, one hundred twelve thousand, one hundred fifty-seven".