213223311121 has 8 divisors (see below), whose sum is σ = 225972434664. Its totient is φ = 200497140480.

The previous prime is 213223311107. The next prime is 213223311151. The reversal of 213223311121 is 121113322312.

It can be written as a sum of positive squares in 4 ways, for example, as 142913485521 + 70309825600 = 378039^2 + 265160^2 .

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

It is not a de Polignac number, because 213223311121 - 2⁹ = 213223310609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213223311092 and 213223311101.

It is not an unprimeable number, because it can be changed into a prime (213223311151) 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, 5719090 + ... + 5756251.

It is an arithmetic number, because the mean of its divisors is an integer number (28246554333).

Almost surely, 2^213223311121 is an apocalyptic number.

It is an amenable number.

213223311121 is a deficient number, since it is larger than the sum of its proper divisors (12749123543).

213223311121 is a wasteful number, since it uses less digits than its factorization.

213223311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11476451.

The product of its digits is 432, while the sum is 22.

Adding to 213223311121 its reverse (121113322312), we get a palindrome (334336633433).

The spelling of 213223311121 in words is "two hundred thirteen billion, two hundred twenty-three million, three hundred eleven thousand, one hundred twenty-one".