21311222202103 has 16 divisors (see below), whose sum is σ = 22757560565760. Its totient is φ = 19912332837600.

The previous prime is 21311222202089. The next prime is 21311222202139. The reversal of 21311222202103 is 30120222211312.

It is a cyclic number.

It is not a de Polignac number, because 21311222202103 - 2¹⁷ = 21311222071031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311222202163) 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, 108471388 + ... + 108667678.

It is an arithmetic number, because the mean of its divisors is an integer number (1422347535360).

Almost surely, 2^{21311222202103} is an apocalyptic number.

21311222202103 is a deficient number, since it is larger than the sum of its proper divisors (1446338363657).

21311222202103 is a wasteful number, since it uses less digits than its factorization.

21311222202103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317118.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21311222202103 its reverse (30120222211312), we get a palindrome (51431444413415).

The spelling of 21311222202103 in words is "twenty-one trillion, three hundred eleven billion, two hundred twenty-two million, two hundred two thousand, one hundred three".