201220001220157 has 2 divisors, whose sum is σ = 201220001220158. Its totient is φ = 201220001220156.

The previous prime is 201220001220047. The next prime is 201220001220299. The reversal of 201220001220157 is 751022100022102.

It is a happy number.

201220001220157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169943396902756 + 31276604317401 = 13036234^2 + 5592549^2 .

It is a cyclic number.

It is not a de Polignac number, because 201220001220157 - 2¹⁵ = 201220001187389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201220001220457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610000610078 + 100610000610079.

It is an arithmetic number, because the mean of its divisors is an integer number (100610000610079).

Almost surely, 2^{201220001220157} is an apocalyptic number.

It is an amenable number.

201220001220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220001220157 is an equidigital number, since it uses as much as digits as its factorization.

201220001220157 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 25.

Adding to 201220001220157 its reverse (751022100022102), we get a palindrome (952242101242259).

The spelling of 201220001220157 in words is "two hundred one trillion, two hundred twenty billion, one million, two hundred twenty thousand, one hundred fifty-seven".