213031200021 has 64 divisors (see below), whose sum is σ = 300166560000. Its totient is φ = 134209861632.

The previous prime is 213031200017. The next prime is 213031200029. The reversal of 213031200021 is 120002130312.

It is not a de Polignac number, because 213031200021 - 2² = 213031200017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213031200029) 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 63 ways as a sum of consecutive naturals, for example, 562087410 + ... + 562087788.

It is an arithmetic number, because the mean of its divisors is an integer number (4690102500).

Almost surely, 2^213031200021 is an apocalyptic number.

It is an amenable number.

213031200021 is a deficient number, since it is larger than the sum of its proper divisors (87135359979).

213031200021 is a wasteful number, since it uses less digits than its factorization.

213031200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 213031200021 its reverse (120002130312), we get a palindrome (333033330333).

The spelling of 213031200021 in words is "two hundred thirteen billion, thirty-one million, two hundred thousand, twenty-one".