2021512200 has 48 divisors (see below), whose sum is σ = 6266689680. Its totient is φ = 539069760.

The previous prime is 2021512189. The next prime is 2021512243. The reversal of 2021512200 is 22151202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2021512200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1683994 + ... + 1685193.

It is an arithmetic number, because the mean of its divisors is an integer number (130556035).

Almost surely, 2^2021512200 is an apocalyptic number.

2021512200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021512200 is an abundant number, since it is smaller than the sum of its proper divisors (4245177480).

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

2021512200 is a wasteful number, since it uses less digits than its factorization.

2021512200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369206 (or 3369197 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2021512200 is about 44961.2299653824. The cubic root of 2021512200 is about 1264.4222288215.

Adding to 2021512200 its reverse (22151202), we get a palindrome (2043663402).

The spelling of 2021512200 in words is "two billion, twenty-one million, five hundred twelve thousand, two hundred".