3120010021 has 4 divisors (see below), whose sum is σ = 3136345344. Its totient is φ = 3103674700.

The previous prime is 3120010009. The next prime is 3120010027. The reversal of 3120010021 is 1200100213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1200100213 = 13 ⋅92315401.

It is a cyclic number.

It is not a de Polignac number, because 3120010021 - 2¹¹ = 3120007973 is a prime.

It is a super-2 number, since 2×3120010021² = 19468925062280840882, 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 (3120010027) 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, 8167375 + ... + 8167756.

It is an arithmetic number, because the mean of its divisors is an integer number (784086336).

Almost surely, 2^3120010021 is an apocalyptic number.

It is an amenable number.

3120010021 is a deficient number, since it is larger than the sum of its proper divisors (16335323).

3120010021 is a wasteful number, since it uses less digits than its factorization.

3120010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16335322.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 3120010021 is about 55857.0498773431. The cubic root of 3120010021 is about 1461.2302792311.

Adding to 3120010021 its reverse (1200100213), we get a palindrome (4320110234).

It can be divided in two parts, 3 and 120010021, that multiplied together give a palindrome (360030063).

The spelling of 3120010021 in words is "three billion, one hundred twenty million, ten thousand, twenty-one".