211320021213 has 24 divisors (see below), whose sum is σ = 348876523008. Its totient is φ = 120743645472.

The previous prime is 211320021193. The next prime is 211320021221. The reversal of 211320021213 is 312120023112.

It is a de Polignac number, because none of the positive numbers 2^k-211320021213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211320021233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 601795 + ... + 885887.

It is an arithmetic number, because the mean of its divisors is an integer number (14536521792).

Almost surely, 2^211320021213 is an apocalyptic number.

It is an amenable number.

211320021213 is a deficient number, since it is larger than the sum of its proper divisors (137556501795).

211320021213 is a wasteful number, since it uses less digits than its factorization.

211320021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295913 (or 295910 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211320021213 its reverse (312120023112), we get a palindrome (523440044325).

The spelling of 211320021213 in words is "two hundred eleven billion, three hundred twenty million, twenty-one thousand, two hundred thirteen".