21103211221303 has 8 divisors (see below), whose sum is σ = 23520606934320. Its totient is φ = 18816485546880.

The previous prime is 21103211221291. The next prime is 21103211221381. The reversal of 21103211221303 is 30312211230112.

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

It is a cyclic number.

It is not a de Polignac number, because 21103211221303 - 2¹⁷ = 21103211090231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103211225303) 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, 32667509308 + ... + 32667509953.

It is an arithmetic number, because the mean of its divisors is an integer number (2940075866790).

Almost surely, 2^{21103211221303} is an apocalyptic number.

21103211221303 is a deficient number, since it is larger than the sum of its proper divisors (2417395713017).

21103211221303 is a wasteful number, since it uses less digits than its factorization.

21103211221303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65335019297.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21103211221303 its reverse (30312211230112), we get a palindrome (51415422451415).

The spelling of 21103211221303 in words is "twenty-one trillion, one hundred three billion, two hundred eleven million, two hundred twenty-one thousand, three hundred three".