3213111331 has 4 divisors (see below), whose sum is σ = 3213429912. Its totient is φ = 3212792752.

The previous prime is 3213111313. The next prime is 3213111359. The reversal of 3213111331 is 1331113123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3213111331 - 2¹¹ = 3213109283 is a prime.

It is a super-2 number, since 2×3213111331² = 20648168850801183122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3213111299 and 3213111308.

It is not an unprimeable number, because it can be changed into a prime (3213111361) 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, 143650 + ... + 164503.

It is an arithmetic number, because the mean of its divisors is an integer number (803357478).

Almost surely, 2^3213111331 is an apocalyptic number.

3213111331 is a deficient number, since it is larger than the sum of its proper divisors (318581).

3213111331 is a wasteful number, since it uses less digits than its factorization.

3213111331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318580.

The product of its digits is 162, while the sum is 19.

The square root of 3213111331 is about 56684.3129181258. The cubic root of 3213111331 is about 1475.6224634676.

Adding to 3213111331 its reverse (1331113123), we get a palindrome (4544224454).

The spelling of 3213111331 in words is "three billion, two hundred thirteen million, one hundred eleven thousand, three hundred thirty-one".