21100331303 has 12 divisors (see below), whose sum is σ = 22460714352. Its totient is φ = 19818224640.

The previous prime is 21100331207. The next prime is 21100331323. The reversal of 21100331303 is 30313300112.

It is not a de Polignac number, because 21100331303 - 2²⁶ = 21033222439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100331323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65783 + ... + 215703.

It is an arithmetic number, because the mean of its divisors is an integer number (1871726196).

Almost surely, 2^21100331303 is an apocalyptic number.

21100331303 is a deficient number, since it is larger than the sum of its proper divisors (1360383049).

21100331303 is a wasteful number, since it uses less digits than its factorization.

21100331303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150442 (or 150425 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21100331303 its reverse (30313300112), we get a palindrome (51413631415).

The spelling of 21100331303 in words is "twenty-one billion, one hundred million, three hundred thirty-one thousand, three hundred three".