213223332121 has 8 divisors (see below), whose sum is σ = 216737177288. Its totient is φ = 209710080000.

The previous prime is 213223332107. The next prime is 213223332139. The reversal of 213223332121 is 121233322312.

It can be written as a sum of positive squares in 4 ways, for example, as 6689440521 + 206533891600 = 81789^2 + 454460^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 213223332121 - 2¹⁷ = 213223201049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213223332151) 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, 608281 + ... + 892441.

It is an arithmetic number, because the mean of its divisors is an integer number (27092147161).

Almost surely, 2^213223332121 is an apocalyptic number.

It is an amenable number.

213223332121 is a deficient number, since it is larger than the sum of its proper divisors (3513845167).

213223332121 is a wasteful number, since it uses less digits than its factorization.

213223332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296523.

The product of its digits is 2592, while the sum is 25.

Adding to 213223332121 its reverse (121233322312), we get a palindrome (334456654433).

The spelling of 213223332121 in words is "two hundred thirteen billion, two hundred twenty-three million, three hundred thirty-two thousand, one hundred twenty-one".