213121300211 has 4 divisors (see below), whose sum is σ = 215190439152. Its totient is φ = 211052161272.

The previous prime is 213121300169. The next prime is 213121300261. The reversal of 213121300211 is 112003121312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213121300211 - 2²² = 213117105907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213121300211.

It is not an unprimeable number, because it can be changed into a prime (213121300261) 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, 1034569316 + ... + 1034569521.

It is an arithmetic number, because the mean of its divisors is an integer number (53797609788).

Almost surely, 2^213121300211 is an apocalyptic number.

213121300211 is a deficient number, since it is larger than the sum of its proper divisors (2069138941).

213121300211 is a wasteful number, since it uses less digits than its factorization.

213121300211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069138940.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 213121300211 its reverse (112003121312), we get a palindrome (325124421523).

The spelling of 213121300211 in words is "two hundred thirteen billion, one hundred twenty-one million, three hundred thousand, two hundred eleven".