212001023213 has 4 divisors (see below), whose sum is σ = 242286883680. Its totient is φ = 181715162748.

The previous prime is 212001023209. The next prime is 212001023257. The reversal of 212001023213 is 312320100212.

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 not a de Polignac number, because 212001023213 - 2² = 212001023209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212001023191 and 212001023200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001020213) 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, 15142930223 + ... + 15142930236.

It is an arithmetic number, because the mean of its divisors is an integer number (60571720920).

Almost surely, 2^212001023213 is an apocalyptic number.

It is an amenable number.

212001023213 is a deficient number, since it is larger than the sum of its proper divisors (30285860467).

212001023213 is an equidigital number, since it uses as much as digits as its factorization.

212001023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30285860466.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212001023213 its reverse (312320100212), we get a palindrome (524321123425).

The spelling of 212001023213 in words is "two hundred twelve billion, one million, twenty-three thousand, two hundred thirteen".