21168705103 has 8 divisors (see below), whose sum is σ = 26053791008. Its totient is φ = 16748865504.

The previous prime is 21168705101. The next prime is 21168705137. The reversal of 21168705103 is 30150786112.

It is a happy number.

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

It is not a de Polignac number, because 21168705103 - 2¹ = 21168705101 is a prime.

It is a super-2 number, since 2×21168705103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21168705101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 116311476 + ... + 116311657.

It is an arithmetic number, because the mean of its divisors is an integer number (3256723876).

Almost surely, 2^21168705103 is an apocalyptic number.

21168705103 is a deficient number, since it is larger than the sum of its proper divisors (4885085905).

21168705103 is a wasteful number, since it uses less digits than its factorization.

21168705103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232623153.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 21168705103 in words is "twenty-one billion, one hundred sixty-eight million, seven hundred five thousand, one hundred three".