121000000201 has 2 divisors, whose sum is σ = 121000000202. Its totient is φ = 121000000200.

The previous prime is 121000000193. The next prime is 121000000213. The reversal of 121000000201 is 102000000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101302158400 + 19697841801 = 318280^2 + 140349^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000000201 - 2³ = 121000000193 is a prime.

It is not a weakly prime, because it can be changed into another prime (121000001201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500000100 + 60500000101.

It is an arithmetic number, because the mean of its divisors is an integer number (60500000101).

Almost surely, 2^121000000201 is an apocalyptic number.

It is an amenable number.

121000000201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000000201 is an equidigital number, since it uses as much as digits as its factorization.

121000000201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 121000000201 its reverse (102000000121), we get a palindrome (223000000322).

The spelling of 121000000201 in words is "one hundred twenty-one billion, two hundred one", and thus it is an aban number.