121020201 has 12 divisors (see below), whose sum is σ = 174911412. Its totient is φ = 80631936.

The previous prime is 121020191. The next prime is 121020209. The reversal of 121020201 is 102020121.

It can be written as a sum of positive squares in 2 ways, for example, as 27878400 + 93141801 = 5280^2 + 9651^2 .

It is not a de Polignac number, because 121020201 - 2⁷ = 121020073 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (121020209) 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, 18565 + ... + 24221.

It is an arithmetic number, because the mean of its divisors is an integer number (14575951).

Almost surely, 2^121020201 is an apocalyptic number.

It is an amenable number.

121020201 is a deficient number, since it is larger than the sum of its proper divisors (53891211).

121020201 is a wasteful number, since it uses less digits than its factorization.

121020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040 (or 8037 counting only the distinct ones).

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

The square root of 121020201 is about 11000.9181889513. The cubic root of 121020201 is about 494.6362678380.

Adding to 121020201 its reverse (102020121), we get a palindrome (223040322).

The spelling of 121020201 in words is "one hundred twenty-one million, twenty thousand, two hundred one".