4112312021 has 4 divisors (see below), whose sum is σ = 4124095500. Its totient is φ = 4100528544.

The previous prime is 4112311991. The next prime is 4112312059. The reversal of 4112312021 is 1202132114.

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 2755200100 + 1357111921 = 52490^2 + 36839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4112312021 is a prime.

It is a super-2 number, since 2×4112312021² = 33822220316122208882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4112312221) 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 3 ways as a sum of consecutive naturals, for example, 5891216 + ... + 5891913.

It is an arithmetic number, because the mean of its divisors is an integer number (1031023875).

Almost surely, 2^4112312021 is an apocalyptic number.

It is an amenable number.

4112312021 is a deficient number, since it is larger than the sum of its proper divisors (11783479).

4112312021 is a wasteful number, since it uses less digits than its factorization.

4112312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11783478.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 4112312021 is about 64127.3110382776. The cubic root of 4112312021 is about 1602.1211477826.

Adding to 4112312021 its reverse (1202132114), we get a palindrome (5314444135).

The spelling of 4112312021 in words is "four billion, one hundred twelve million, three hundred twelve thousand, twenty-one".