319000012021 has 4 divisors (see below), whose sum is σ = 320670169344. Its totient is φ = 317329854700.

The previous prime is 319000011991. The next prime is 319000012027. The reversal of 319000012021 is 120210000913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 319000012021 - 2⁹ = 319000011509 is a prime.

It is a super-2 number, since 2×319000012021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 319000012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319000012027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 835078375 + ... + 835078756.

It is an arithmetic number, because the mean of its divisors is an integer number (80167542336).

Almost surely, 2^319000012021 is an apocalyptic number.

It is an amenable number.

319000012021 is a deficient number, since it is larger than the sum of its proper divisors (1670157323).

319000012021 is a wasteful number, since it uses less digits than its factorization.

319000012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670157322.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 319000012021 its reverse (120210000913), we get a palindrome (439210012934).

The spelling of 319000012021 in words is "three hundred nineteen billion, twelve thousand, twenty-one".