213121333311 has 16 divisors (see below), whose sum is σ = 293649121920. Its totient is φ = 137402647200.

The previous prime is 213121333307. The next prime is 213121333361. The reversal of 213121333311 is 113333121312.

It is not a de Polignac number, because 213121333311 - 2² = 213121333307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121333361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8165701 + ... + 8191758.

It is an arithmetic number, because the mean of its divisors is an integer number (18353070120).

Almost surely, 2^213121333311 is an apocalyptic number.

213121333311 is a deficient number, since it is larger than the sum of its proper divisors (80527788609).

213121333311 is a wasteful number, since it uses less digits than its factorization.

213121333311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16357606.

The product of its digits is 972, while the sum is 24.

Adding to 213121333311 its reverse (113333121312), we get a palindrome (326454454623).

The spelling of 213121333311 in words is "two hundred thirteen billion, one hundred twenty-one million, three hundred thirty-three thousand, three hundred eleven".