21202021102 has 8 divisors (see below), whose sum is σ = 32403089016. Its totient is φ = 10400991432.

The previous prime is 21202021097. The next prime is 21202021103. The reversal of 21202021102 is 20112020212.

It is a happy number.

21202021102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202021103) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 100009428 + ... + 100009639.

It is an arithmetic number, because the mean of its divisors is an integer number (4050386127).

Almost surely, 2^21202021102 is an apocalyptic number.

21202021102 is a deficient number, since it is larger than the sum of its proper divisors (11201067914).

21202021102 is a wasteful number, since it uses less digits than its factorization.

21202021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200019122.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21202021102 its reverse (20112020212), we get a palindrome (41314041314).

The spelling of 21202021102 in words is "twenty-one billion, two hundred two million, twenty-one thousand, one hundred two".