3112001021 has 4 divisors (see below), whose sum is σ = 3112463292. Its totient is φ = 3111538752.

The previous prime is 3112001003. The next prime is 3112001033. The reversal of 3112001021 is 1201002113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1613227225 + 1498773796 = 40165^2 + 38714^2 .

It is a cyclic number.

It is not a de Polignac number, because 3112001021 - 2²⁶ = 3044892157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3112000993 and 3112001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3112001041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220886 + ... + 234551.

It is an arithmetic number, because the mean of its divisors is an integer number (778115823).

Almost surely, 2^3112001021 is an apocalyptic number.

It is an amenable number.

3112001021 is a deficient number, since it is larger than the sum of its proper divisors (462271).

3112001021 is an equidigital number, since it uses as much as digits as its factorization.

3112001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462270.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 3112001021 is about 55785.3118750805. The cubic root of 3112001021 is about 1459.9788920761.

Adding to 3112001021 its reverse (1201002113), we get a palindrome (4313003134).

The spelling of 3112001021 in words is "three billion, one hundred twelve million, one thousand, twenty-one".