213023323021 has 4 divisors (see below), whose sum is σ = 213270164352. Its totient is φ = 212776481692.

The previous prime is 213023323001. The next prime is 213023323039. The reversal of 213023323021 is 120323320312.

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 213023323021 - 2⁵ = 213023322989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213023322983 and 213023323001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213023323001) 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, 123419371 + ... + 123421096.

It is an arithmetic number, because the mean of its divisors is an integer number (53317541088).

Almost surely, 2^213023323021 is an apocalyptic number.

It is an amenable number.

213023323021 is a deficient number, since it is larger than the sum of its proper divisors (246841331).

213023323021 is an equidigital number, since it uses as much as digits as its factorization.

213023323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246841330.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 213023323021 its reverse (120323320312), we get a palindrome (333346643333).

The spelling of 213023323021 in words is "two hundred thirteen billion, twenty-three million, three hundred twenty-three thousand, twenty-one".