21123332319 has 32 divisors (see below), whose sum is σ = 29637158400. Its totient is φ = 13356528768.

The previous prime is 21123332317. The next prime is 21123332369. The reversal of 21123332319 is 91323332112.

It is not a de Polignac number, because 21123332319 - 2¹ = 21123332317 is a prime.

It is a super-2 number, since 2×21123332319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123332311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7534572 + ... + 7537374.

It is an arithmetic number, because the mean of its divisors is an integer number (926161200).

Almost surely, 2^21123332319 is an apocalyptic number.

21123332319 is a deficient number, since it is larger than the sum of its proper divisors (8513826081).

21123332319 is a wasteful number, since it uses less digits than its factorization.

21123332319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711.

The product of its digits is 5832, while the sum is 30.

The spelling of 21123332319 in words is "twenty-one billion, one hundred twenty-three million, three hundred thirty-two thousand, three hundred nineteen".