21131333311303 has 16 divisors (see below), whose sum is σ = 23400535248000. Its totient is φ = 19001234562912.

The previous prime is 21131333311243. The next prime is 21131333311343. The reversal of 21131333311303 is 30311333313112.

It is not a de Polignac number, because 21131333311303 - 2²¹ = 21131331214151 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 (21131333311343) 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, 324974925 + ... + 325039942.

It is an arithmetic number, because the mean of its divisors is an integer number (1462533453000).

Almost surely, 2^{21131333311303} is an apocalyptic number.

21131333311303 is a deficient number, since it is larger than the sum of its proper divisors (2269201936697).

21131333311303 is a wasteful number, since it uses less digits than its factorization.

21131333311303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650014974.

The product of its (nonzero) digits is 4374, while the sum is 28.

Adding to 21131333311303 its reverse (30311333313112), we get a palindrome (51442666624415).

The spelling of 21131333311303 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred thirty-three million, three hundred eleven thousand, three hundred three".