3012100021 has 12 divisors (see below), whose sum is σ = 3531468288. Its totient is φ = 2561465592.

The previous prime is 3012099949. The next prime is 3012100057. The reversal of 3012100021 is 1200012103.

It is not a de Polignac number, because 3012100021 - 2⁹ = 3012099509 is a prime.

It is a super-4 number, since 4×3012100021⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3012099980 and 3012100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3012100061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235791 + ... + 248236.

It is an arithmetic number, because the mean of its divisors is an integer number (294289024).

Almost surely, 2^3012100021 is an apocalyptic number.

It is an amenable number.

3012100021 is a deficient number, since it is larger than the sum of its proper divisors (519368267).

3012100021 is a wasteful number, since it uses less digits than its factorization.

3012100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484168 (or 484161 counting only the distinct ones).

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

The square root of 3012100021 is about 54882.6021704511. The cubic root of 3012100021 is about 1444.1859970011.

Adding to 3012100021 its reverse (1200012103), we get a palindrome (4212112124).

The spelling of 3012100021 in words is "three billion, twelve million, one hundred thousand, twenty-one".