21131220013303 has 16 divisors (see below), whose sum is σ = 22401452189664. Its totient is φ = 19864025349120.

The previous prime is 21131220013279. The next prime is 21131220013327. The reversal of 21131220013303 is 30331002213112.

It is an interprime number because it is at equal distance from previous prime (21131220013279) and next prime (21131220013327).

It is not a de Polignac number, because 21131220013303 - 2²⁵ = 21131186458871 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 (21131220011303) 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, 51674883 + ... + 52082203.

It is an arithmetic number, because the mean of its divisors is an integer number (1400090761854).

Almost surely, 2^{21131220013303} is an apocalyptic number.

21131220013303 is a deficient number, since it is larger than the sum of its proper divisors (1270232176361).

21131220013303 is a wasteful number, since it uses less digits than its factorization.

21131220013303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411042.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21131220013303 its reverse (30331002213112), we get a palindrome (51462222226415).

The spelling of 21131220013303 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred twenty million, thirteen thousand, three hundred three".