202102121 has 8 divisors (see below), whose sum is σ = 218461320. Its totient is φ = 185859072.

The previous prime is 202102097. The next prime is 202102123. The reversal of 202102121 is 121201202.

It is a happy number.

202102121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 774400 + 201327721 = 880^2 + 14189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202102121 - 2⁶ = 202102057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202102123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25400 + ... + 32393.

It is an arithmetic number, because the mean of its divisors is an integer number (27307665).

Almost surely, 2^202102121 is an apocalyptic number.

It is an amenable number.

202102121 is a deficient number, since it is larger than the sum of its proper divisors (16359199).

202102121 is a wasteful number, since it uses less digits than its factorization.

202102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58075.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 202102121 is about 14216.2625538501. The cubic root of 202102121 is about 586.8452906425.

Adding to 202102121 its reverse (121201202), we get a palindrome (323303323).

The spelling of 202102121 in words is "two hundred two million, one hundred two thousand, one hundred twenty-one".