22201221120157 has 2 divisors, whose sum is σ = 22201221120158. Its totient is φ = 22201221120156.

The previous prime is 22201221120053. The next prime is 22201221120251. The reversal of 22201221120157 is 75102112210222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17586775808281 + 4614445311876 = 4193659^2 + 2148126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22201221120157 is a prime.

It is a super-2 number, since 2×22201221120157² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22201221120557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100610560078 + 11100610560079.

It is an arithmetic number, because the mean of its divisors is an integer number (11100610560079).

Almost surely, 2^{22201221120157} is an apocalyptic number.

It is an amenable number.

22201221120157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201221120157 is an equidigital number, since it uses as much as digits as its factorization.

22201221120157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 22201221120157 its reverse (75102112210222), we get a palindrome (97303333330379).

The spelling of 22201221120157 in words is "twenty-two trillion, two hundred one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred fifty-seven".