213202412021 has 4 divisors (see below), whose sum is σ = 213204674112. Its totient is φ = 213200149932.

The previous prime is 213202412009. The next prime is 213202412041. The reversal of 213202412021 is 120214202312.

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 a de Polignac number, because none of the positive numbers 2^k-213202412021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213202411984 and 213202412002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213202412041) 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, 983231 + ... + 1180316.

It is an arithmetic number, because the mean of its divisors is an integer number (53301168528).

Almost surely, 2^213202412021 is an apocalyptic number.

It is an amenable number.

213202412021 is a deficient number, since it is larger than the sum of its proper divisors (2262091).

213202412021 is an equidigital number, since it uses as much as digits as its factorization.

213202412021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262090.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 213202412021 its reverse (120214202312), we get a palindrome (333416614333).

The spelling of 213202412021 in words is "two hundred thirteen billion, two hundred two million, four hundred twelve thousand, twenty-one".