21117103371 has 48 divisors (see below), whose sum is σ = 37664250624. Its totient is φ = 11102277312.

The previous prime is 21117103369. The next prime is 21117103393. The reversal of 21117103371 is 17330171112.

It is not a de Polignac number, because 21117103371 - 2¹ = 21117103369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21117105371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209440 + ... + 293426.

It is an arithmetic number, because the mean of its divisors is an integer number (784671888).

Almost surely, 2^21117103371 is an apocalyptic number.

21117103371 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21117103371 is a deficient number, since it is larger than the sum of its proper divisors (16547147253).

21117103371 is a wasteful number, since it uses less digits than its factorization.

21117103371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84320 (or 84317 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

Adding to 21117103371 its reverse (17330171112), we get a palindrome (38447274483).

The spelling of 21117103371 in words is "twenty-one billion, one hundred seventeen million, one hundred three thousand, three hundred seventy-one".