213121432333 has 4 divisors (see below), whose sum is σ = 214312055040. Its totient is φ = 211930809628.

The previous prime is 213121432319. The next prime is 213121432351. The reversal of 213121432333 is 333234121312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213121432333 - 2⁵ = 213121432301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121432133) 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, 595311085 + ... + 595311442.

It is an arithmetic number, because the mean of its divisors is an integer number (53578013760).

Almost surely, 2^213121432333 is an apocalyptic number.

It is an amenable number.

213121432333 is a deficient number, since it is larger than the sum of its proper divisors (1190622707).

213121432333 is a wasteful number, since it uses less digits than its factorization.

213121432333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190622706.

The product of its digits is 7776, while the sum is 28.

Adding to 213121432333 its reverse (333234121312), we get a palindrome (546355553645).

The spelling of 213121432333 in words is "two hundred thirteen billion, one hundred twenty-one million, four hundred thirty-two thousand, three hundred thirty-three".