213101302021 has 4 divisors (see below), whose sum is σ = 213109604512. Its totient is φ = 213092999532.

The previous prime is 213101302009. The next prime is 213101302039. The reversal of 213101302021 is 120203101312.

213101302021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-213101302021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213101301986 and 213101302004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213101300021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4112625 + ... + 4164118.

It is an arithmetic number, because the mean of its divisors is an integer number (53277401128).

Almost surely, 2^213101302021 is an apocalyptic number.

It is an amenable number.

213101302021 is a deficient number, since it is larger than the sum of its proper divisors (8302491).

213101302021 is an equidigital number, since it uses as much as digits as its factorization.

213101302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8302490.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 213101302021 its reverse (120203101312), we get a palindrome (333304403333).

The spelling of 213101302021 in words is "two hundred thirteen billion, one hundred one million, three hundred two thousand, twenty-one".