201200121 has 12 divisors (see below), whose sum is σ = 291489172. Its totient is φ = 133733376.

The previous prime is 201200081. The next prime is 201200183. The reversal of 201200121 is 121002102.

It can be written as a sum of positive squares in 2 ways, for example, as 78854400 + 122345721 = 8880^2 + 11061^2 .

It is not a de Polignac number, because 201200121 - 2²⁷ = 66982393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201200221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30136 + ... + 36201.

Almost surely, 2^201200121 is an apocalyptic number.

It is an amenable number.

201200121 is a deficient number, since it is larger than the sum of its proper divisors (90289051).

201200121 is a wasteful number, since it uses less digits than its factorization.

201200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66680 (or 66677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 201200121 is about 14184.5028464166. The cubic root of 201200121 is about 585.9709407560.

Adding to 201200121 its reverse (121002102), we get a palindrome (322202223).

The spelling of 201200121 in words is "two hundred one million, two hundred thousand, one hundred twenty-one".