21002022202102 has 4 divisors (see below), whose sum is σ = 31503033303156. Its totient is φ = 10501011101050.

The previous prime is 21002022202069. The next prime is 21002022202211. The reversal of 21002022202102 is 20120222020012.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250505550524 + ... + 5250505550527.

It is an arithmetic number, because the mean of its divisors is an integer number (7875758325789).

Almost surely, 2^{21002022202102} is an apocalyptic number.

21002022202102 is a deficient number, since it is larger than the sum of its proper divisors (10501011101054).

21002022202102 is a wasteful number, since it uses less digits than its factorization.

21002022202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501011101053.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21002022202102 its reverse (20120222020012), we get a palindrome (41122244222114).

The spelling of 21002022202102 in words is "twenty-one trillion, two billion, twenty-two million, two hundred two thousand, one hundred two".