3113212021 has 8 divisors (see below), whose sum is σ = 3131745624. Its totient is φ = 3094732800.

The previous prime is 3113212009. The next prime is 3113212033. The reversal of 3113212021 is 1202123113.

It is an interprime number because it is at equal distance from previous prime (3113212009) and next prime (3113212033).

It can be written as a sum of positive squares in 4 ways, for example, as 2814302500 + 298909521 = 53050^2 + 17289^2 .

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 3113212021 - 2¹¹ = 3113209973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3113211986 and 3113212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3113212061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104245 + ... + 130741.

It is an arithmetic number, because the mean of its divisors is an integer number (391468203).

Almost surely, 2^3113212021 is an apocalyptic number.

It is an amenable number.

3113212021 is a deficient number, since it is larger than the sum of its proper divisors (18533603).

3113212021 is a wasteful number, since it uses less digits than its factorization.

3113212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27191.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3113212021 is about 55796.1649309341. The cubic root of 3113212021 is about 1460.1682456077.

Adding to 3113212021 its reverse (1202123113), we get a palindrome (4315335134).

The spelling of 3113212021 in words is "three billion, one hundred thirteen million, two hundred twelve thousand, twenty-one".