213121210211 has 8 divisors (see below), whose sum is σ = 262303028064. Its totient is φ = 168623375040.

The previous prime is 213121210129. The next prime is 213121210261. The reversal of 213121210211 is 112012121312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213121210211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213121210211.

It is not an unprimeable number, because it can be changed into a prime (213121210261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1170995570 + ... + 1170995751.

It is an arithmetic number, because the mean of its divisors is an integer number (32787878508).

Almost surely, 2^213121210211 is an apocalyptic number.

213121210211 is a deficient number, since it is larger than the sum of its proper divisors (49181817853).

213121210211 is a wasteful number, since it uses less digits than its factorization.

213121210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341991341.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 213121210211 its reverse (112012121312), we get a palindrome (325133331523).

The spelling of 213121210211 in words is "two hundred thirteen billion, one hundred twenty-one million, two hundred ten thousand, two hundred eleven".