121100201 has 4 divisors (see below), whose sum is σ = 125276100. Its totient is φ = 116924304.

The previous prime is 121100171. The next prime is 121100219. The reversal of 121100201 is 102001121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45427600 + 75672601 = 6740^2 + 8699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121100201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2087906 + ... + 2087963.

It is an arithmetic number, because the mean of its divisors is an integer number (31319025).

Almost surely, 2^121100201 is an apocalyptic number.

It is an amenable number.

121100201 is a deficient number, since it is larger than the sum of its proper divisors (4175899).

121100201 is an equidigital number, since it uses as much as digits as its factorization.

121100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175898.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121100201 is about 11004.5536483767. The cubic root of 121100201 is about 494.7452363818.

Adding to 121100201 its reverse (102001121), we get a palindrome (223101322).

The spelling of 121100201 in words is "one hundred twenty-one million, one hundred thousand, two hundred one".