1222001122157 has 2 divisors, whose sum is σ = 1222001122158. Its totient is φ = 1222001122156.

The previous prime is 1222001122109. The next prime is 1222001122183. The reversal of 1222001122157 is 7512211002221.

It is an a-pointer prime, because the next prime (1222001122183) can be obtained adding 1222001122157 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1213388168521 + 8612953636 = 1101539^2 + 92806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222001122157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222001152157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611000561078 + 611000561079.

It is an arithmetic number, because the mean of its divisors is an integer number (611000561079).

Almost surely, 2^{1222001122157} is an apocalyptic number.

It is an amenable number.

1222001122157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222001122157 is an equidigital number, since it uses as much as digits as its factorization.

1222001122157 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 26.

Adding to 1222001122157 its reverse (7512211002221), we get a palindrome (8734212124378).

The spelling of 1222001122157 in words is "one trillion, two hundred twenty-two billion, one million, one hundred twenty-two thousand, one hundred fifty-seven".