202122121 has 8 divisors (see below), whose sum is σ = 204069888. Its totient is φ = 200184000.

The previous prime is 202122113. The next prime is 202122143. The reversal of 202122121 is 121221202.

It is a happy number.

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 202122121 - 2³ = 202122113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202122421) 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, 43836 + ... + 48226.

It is an arithmetic number, because the mean of its divisors is an integer number (25508736).

Almost surely, 2^202122121 is an apocalyptic number.

It is an amenable number.

202122121 is a deficient number, since it is larger than the sum of its proper divisors (1947767).

202122121 is a wasteful number, since it uses less digits than its factorization.

202122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 202122121 is about 14216.9659562088. The cubic root of 202122121 is about 586.8646480489.

Adding to 202122121 its reverse (121221202), we get a palindrome (323343323).

It can be divided in two parts, 2021 and 22121, that added together give a palindrome (24142).

The spelling of 202122121 in words is "two hundred two million, one hundred twenty-two thousand, one hundred twenty-one".