21211022103 has 8 divisors (see below), whose sum is σ = 28357185648. Its totient is φ = 14102769984.

The previous prime is 21211022071. The next prime is 21211022113. The reversal of 21211022103 is 30122011212.

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

It is not a de Polignac number, because 21211022103 - 2⁵ = 21211022071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211022113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9476550 + ... + 9478787.

It is an arithmetic number, because the mean of its divisors is an integer number (3544648206).

Almost surely, 2^21211022103 is an apocalyptic number.

21211022103 is a deficient number, since it is larger than the sum of its proper divisors (7146163545).

21211022103 is a wasteful number, since it uses less digits than its factorization.

21211022103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18955713.

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

Adding to 21211022103 its reverse (30122011212), we get a palindrome (51333033315).

The spelling of 21211022103 in words is "twenty-one billion, two hundred eleven million, twenty-two thousand, one hundred three".