202021210202102 has 4 divisors (see below), whose sum is σ = 303031815303156. Its totient is φ = 101010605101050.

The previous prime is 202021210202099. The next prime is 202021210202153. The reversal of 202021210202102 is 201202012120202.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505302550524 + ... + 50505302550527.

It is an arithmetic number, because the mean of its divisors is an integer number (75757953825789).

Almost surely, 2^{202021210202102} is an apocalyptic number.

202021210202102 is a deficient number, since it is larger than the sum of its proper divisors (101010605101054).

202021210202102 is a wasteful number, since it uses less digits than its factorization.

202021210202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101010605101053.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202021210202102 its reverse (201202012120202), we get a palindrome (403223222322304).

The spelling of 202021210202102 in words is "two hundred two trillion, twenty-one billion, two hundred ten million, two hundred two thousand, one hundred two".