21320122103 has 16 divisors (see below), whose sum is σ = 24683205120. Its totient is φ = 18036802656.

The previous prime is 21320122097. The next prime is 21320122123. The reversal of 21320122103 is 30122102312.

It is a cyclic number.

It is not a de Polignac number, because 21320122103 - 2¹⁰ = 21320121079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320122123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603926 + ... + 638252.

It is an arithmetic number, because the mean of its divisors is an integer number (1542700320).

Almost surely, 2^21320122103 is an apocalyptic number.

21320122103 is a deficient number, since it is larger than the sum of its proper divisors (3363083017).

21320122103 is a wasteful number, since it uses less digits than its factorization.

21320122103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35486.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21320122103 its reverse (30122102312), we get a palindrome (51442224415).

The spelling of 21320122103 in words is "twenty-one billion, three hundred twenty million, one hundred twenty-two thousand, one hundred three".