201000121237 has 2 divisors, whose sum is σ = 201000121238. Its totient is φ = 201000121236.

The previous prime is 201000121219. The next prime is 201000121241. The reversal of 201000121237 is 732121000102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200310848721 + 689272516 = 447561^2 + 26254^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000121237 - 2³¹ = 198852637589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201000121207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500060618 + 100500060619.

It is an arithmetic number, because the mean of its divisors is an integer number (100500060619).

Almost surely, 2^201000121237 is an apocalyptic number.

It is an amenable number.

201000121237 is a deficient number, since it is larger than the sum of its proper divisors (1).

201000121237 is an equidigital number, since it uses as much as digits as its factorization.

201000121237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 201000121237 its reverse (732121000102), we get a palindrome (933121121339).

The spelling of 201000121237 in words is "two hundred one billion, one hundred twenty-one thousand, two hundred thirty-seven".