2021155204 has 12 divisors (see below), whose sum is σ = 3539517184. Its totient is φ = 1009864584.

The previous prime is 2021155193. The next prime is 2021155231. The reversal of 2021155204 is 4025511202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171852 + ... + 183235.

Almost surely, 2^2021155204 is an apocalyptic number.

It is an amenable number.

2021155204 is a deficient number, since it is larger than the sum of its proper divisors (1518361980).

2021155204 is a wasteful number, since it uses less digits than its factorization.

2021155204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356514 (or 356512 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2021155204 is about 44957.2597474535. The cubic root of 2021155204 is about 1264.3477927546.

Adding to 2021155204 its reverse (4025511202), we get a palindrome (6046666406).

The spelling of 2021155204 in words is "two billion, twenty-one million, one hundred fifty-five thousand, two hundred four".