202021121100202 has 4 divisors (see below), whose sum is σ = 303031681650306. Its totient is φ = 101010560550100.

The previous prime is 202021121100193. The next prime is 202021121100221. The reversal of 202021121100202 is 202001121120202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 192617508726241 + 9403612373961 = 13878671^2 + 3066531^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505280275049 + ... + 50505280275052.

Almost surely, 2^{202021121100202} is an apocalyptic number.

202021121100202 is a deficient number, since it is larger than the sum of its proper divisors (101010560550104).

202021121100202 is a wasteful number, since it uses less digits than its factorization.

202021121100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101010560550103.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202021121100202 its reverse (202001121120202), we get a palindrome (404022242220404).

The spelling of 202021121100202 in words is "two hundred two trillion, twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred two".