202102202121 has 8 divisors (see below), whose sum is σ = 269723106240. Its totient is φ = 134608049712.

The previous prime is 202102202083. The next prime is 202102202191. The reversal of 202102202121 is 121202201202.

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

It is not a de Polignac number, because 202102202121 - 2¹⁷ = 202102071049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202102202121.

It is not an unprimeable number, because it can be changed into a prime (202102202191) 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, 31684206 + ... + 31690583.

It is an arithmetic number, because the mean of its divisors is an integer number (33715388280).

Almost surely, 2^202102202121 is an apocalyptic number.

It is an amenable number.

202102202121 is a deficient number, since it is larger than the sum of its proper divisors (67620904119).

202102202121 is a wasteful number, since it uses less digits than its factorization.

202102202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63375855.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202102202121 its reverse (121202201202), we get a palindrome (323304403323).

The spelling of 202102202121 in words is "two hundred two billion, one hundred two million, two hundred two thousand, one hundred twenty-one".