201001220121157 has 2 divisors, whose sum is σ = 201001220121158. Its totient is φ = 201001220121156.

The previous prime is 201001220121109. The next prime is 201001220121161. The reversal of 201001220121157 is 751121022100102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142036006708996 + 58965213412161 = 11917886^2 + 7678881^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001220121157 - 2³¹ = 200999072637509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201001220127157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500610060578 + 100500610060579.

It is an arithmetic number, because the mean of its divisors is an integer number (100500610060579).

Almost surely, 2^{201001220121157} is an apocalyptic number.

It is an amenable number.

201001220121157 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001220121157 is an equidigital number, since it uses as much as digits as its factorization.

201001220121157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

Adding to 201001220121157 its reverse (751121022100102), we get a palindrome (952122242221259).

The spelling of 201001220121157 in words is "two hundred one trillion, one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred fifty-seven".