3012100020 has 120 divisors (see below), whose sum is σ = 9946490400. Its totient is φ = 760943808.

The previous prime is 3012099949. The next prime is 3012100057. The reversal of 3012100020 is 200012103.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 3012099975 and 3012100011.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 18150 + ... + 79709.

It is an arithmetic number, because the mean of its divisors is an integer number (82887420).

Almost surely, 2^3012100020 is an apocalyptic number.

3012100020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3012100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4973245200).

3012100020 is an abundant number, since it is smaller than the sum of its proper divisors (6934390380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3012100020 is a wasteful number, since it uses less digits than its factorization.

3012100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97899 (or 97888 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 3012100020 is about 54882.6021613407. The cubic root of 3012100020 is about 1444.1859968413.

Adding to 3012100020 its reverse (200012103), we get a palindrome (3212112123).

The spelling of 3012100020 in words is "three billion, twelve million, one hundred thousand, twenty".