202102121121202 has 16 divisors (see below), whose sum is σ = 304012545646680. Its totient is φ = 100764742743808.

The previous prime is 202102121121193. The next prime is 202102121121209. The reversal of 202102121121202 is 202121121201202.

It can be written as a sum of positive squares in 4 ways, for example, as 45220258609201 + 156881862512001 = 6724601^2 + 12525249^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 202102121121202.

It is not an unprimeable number, because it can be changed into a prime (202102121121209) 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, 31253383 + ... + 37161514.

Almost surely, 2^{202102121121202} is an apocalyptic number.

202102121121202 is a deficient number, since it is larger than the sum of its proper divisors (101910424525478).

202102121121202 is a wasteful number, since it uses less digits than its factorization.

202102121121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68419085.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202102121121202 its reverse (202121121201202), we get a palindrome (404223242322404).

The spelling of 202102121121202 in words is "two hundred two trillion, one hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred two".