21310409119 has 4 divisors (see below), whose sum is σ = 21478207744. Its totient is φ = 21142610496.

The previous prime is 21310409093. The next prime is 21310409147. The reversal of 21310409119 is 91190401312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21310409119 - 2¹¹ = 21310407071 is a prime.

It is a super-3 number, since 3×21310409119³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310409819) 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 3 ways as a sum of consecutive naturals, for example, 83899122 + ... + 83899375.

It is an arithmetic number, because the mean of its divisors is an integer number (5369551936).

Almost surely, 2^21310409119 is an apocalyptic number.

21310409119 is a deficient number, since it is larger than the sum of its proper divisors (167798625).

21310409119 is a wasteful number, since it uses less digits than its factorization.

21310409119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167798624.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 21310409119 in words is "twenty-one billion, three hundred ten million, four hundred nine thousand, one hundred nineteen".