3100021 has 8 divisors (see below), whose sum is σ = 3286080. Its totient is φ = 2916288.

The previous prime is 3100007. The next prime is 3100043. The reversal of 3100021 is 1200013.

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 3100021 - 2⁷ = 3099893 is a prime.

It is a super-2 number, since 2×3100021² = 19220260400882, which contains 22 as substring.

It is a Duffinian number.

3100021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3099977 and 3100013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3100061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2685 + ... + 3661.

It is an arithmetic number, because the mean of its divisors is an integer number (410760).

Almost surely, 2^3100021 is an apocalyptic number.

It is an amenable number.

3100021 is a deficient number, since it is larger than the sum of its proper divisors (186059).

3100021 is a wasteful number, since it uses less digits than its factorization.

3100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 3100021 is about 1760.6876497551. The cubic root of 3100021 is about 145.8103028303.

Adding to 3100021 its reverse (1200013), we get a palindrome (4300034).

The spelling of 3100021 in words is "three million, one hundred thousand, twenty-one".