201232121 has 2 divisors, whose sum is σ = 201232122. Its totient is φ = 201232120.

The previous prime is 201232103. The next prime is 201232127. The reversal of 201232121 is 121232102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125193721 + 76038400 = 11189^2 + 8720^2 .

It is a cyclic number.

It is not a de Polignac number, because 201232121 - 2¹⁰ = 201231097 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 201232096 and 201232105.

It is not a weakly prime, because it can be changed into another prime (201232127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100616060 + 100616061.

It is an arithmetic number, because the mean of its divisors is an integer number (100616061).

Almost surely, 2^201232121 is an apocalyptic number.

It is an amenable number.

201232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201232121 is an equidigital number, since it uses as much as digits as its factorization.

201232121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 201232121 is about 14185.6307931653. The cubic root of 201232121 is about 586.0020044816.

Adding to 201232121 its reverse (121232102), we get a palindrome (322464223).

The spelling of 201232121 in words is "two hundred one million, two hundred thirty-two thousand, one hundred twenty-one".