3042100021 has 4 divisors (see below), whose sum is σ = 3042424000. Its totient is φ = 3041776044.

The previous prime is 3042099997. The next prime is 3042100043. The reversal of 3042100021 is 1200012403.

3042100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 1200012403 = 347 ⋅3458249.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3042100021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3042099974 and 3042100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3042110021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147471 + ... + 166828.

It is an arithmetic number, because the mean of its divisors is an integer number (760606000).

Almost surely, 2^3042100021 is an apocalyptic number.

It is an amenable number.

3042100021 is a deficient number, since it is larger than the sum of its proper divisors (323979).

3042100021 is an equidigital number, since it uses as much as digits as its factorization.

3042100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323978.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 3042100021 is about 55155.2356626277. The cubic root of 3042100021 is about 1448.9647816590.

Adding to 3042100021 its reverse (1200012403), we get a palindrome (4242112424).

The spelling of 3042100021 in words is "three billion, forty-two million, one hundred thousand, twenty-one".