21200342102 has 8 divisors (see below), whose sum is σ = 31801226616. Its totient is φ = 10599933232.

The previous prime is 21200342083. The next prime is 21200342117. The reversal of 21200342102 is 20124300212.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29633 + ... + 208035.

It is an arithmetic number, because the mean of its divisors is an integer number (3975153327).

Almost surely, 2^21200342102 is an apocalyptic number.

21200342102 is a deficient number, since it is larger than the sum of its proper divisors (10600884514).

21200342102 is a wasteful number, since it uses less digits than its factorization.

21200342102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237822.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21200342102 its reverse (20124300212), we get a palindrome (41324642314).

The spelling of 21200342102 in words is "twenty-one billion, two hundred million, three hundred forty-two thousand, one hundred two".