121009201 has 2 divisors, whose sum is σ = 121009202. Its totient is φ = 121009200.

The previous prime is 121009183. The next prime is 121009237. The reversal of 121009201 is 102900121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83174400 + 37834801 = 9120^2 + 6151^2 .

It is an emirp because it is prime and its reverse (102900121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121009201 - 2⁷ = 121009073 is a prime.

It is not a weakly prime, because it can be changed into another prime (121009261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60504600 + 60504601.

It is an arithmetic number, because the mean of its divisors is an integer number (60504601).

Almost surely, 2^121009201 is an apocalyptic number.

It is an amenable number.

121009201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121009201 is an equidigital number, since it uses as much as digits as its factorization.

121009201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 121009201 is about 11000.4182193224. The cubic root of 121009201 is about 494.6212809081.

Adding to 121009201 its reverse (102900121), we get a palindrome (223909322).

The spelling of 121009201 in words is "one hundred twenty-one million, nine thousand, two hundred one".