21202113102 has 8 divisors (see below), whose sum is σ = 42404226216. Its totient is φ = 7067371032.

The previous prime is 21202113077. The next prime is 21202113103. The reversal of 21202113102 is 20131120212.

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

21202113102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202113103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1766842753 + ... + 1766842764.

It is an arithmetic number, because the mean of its divisors is an integer number (5300528277).

Almost surely, 2^21202113102 is an apocalyptic number.

21202113102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202113102 is a wasteful number, since it uses less digits than its factorization.

21202113102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533685522.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21202113102 its reverse (20131120212), we get a palindrome (41333233314).

The spelling of 21202113102 in words is "twenty-one billion, two hundred two million, one hundred thirteen thousand, one hundred two".