213024004021 has 16 divisors (see below), whose sum is σ = 214631147520. Its totient is φ = 211424653440.

The previous prime is 213024004013. The next prime is 213024004069. The reversal of 213024004021 is 120400420312.

It is a cyclic number.

It is not a de Polignac number, because 213024004021 - 2³ = 213024004013 is a prime.

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 213024004021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213024004321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148035420 + ... + 148036858.

It is an arithmetic number, because the mean of its divisors is an integer number (13414446720).

Almost surely, 2^213024004021 is an apocalyptic number.

It is an amenable number.

213024004021 is a deficient number, since it is larger than the sum of its proper divisors (1607143499).

213024004021 is a wasteful number, since it uses less digits than its factorization.

213024004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 213024004021 its reverse (120400420312), we get a palindrome (333424424333).

The spelling of 213024004021 in words is "two hundred thirteen billion, twenty-four million, four thousand, twenty-one".