2021208172 has 12 divisors (see below), whose sum is σ = 3570172200. Its totient is φ = 1001158976.

The previous prime is 2021208143. The next prime is 2021208173. The reversal of 2021208172 is 2718021202.

It is not an unprimeable number, because it can be changed into a prime (2021208173) 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, 2360797 + ... + 2361652.

It is an arithmetic number, because the mean of its divisors is an integer number (297514350).

Almost surely, 2^2021208172 is an apocalyptic number.

It is an amenable number.

2021208172 is a deficient number, since it is larger than the sum of its proper divisors (1548964028).

2021208172 is a wasteful number, since it uses less digits than its factorization.

2021208172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722560 (or 4722558 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 2021208172 is about 44957.8488364379. The cubic root of 2021208172 is about 1264.3588374925.

Adding to 2021208172 its reverse (2718021202), we get a palindrome (4739229374).

The spelling of 2021208172 in words is "two billion, twenty-one million, two hundred eight thousand, one hundred seventy-two".