2021621230 has 8 divisors (see below), whose sum is σ = 3638918232. Its totient is φ = 808648488.

The previous prime is 2021621219. The next prime is 2021621237. The reversal of 2021621230 is 321261202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2021621198 and 2021621207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021621237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101081052 + ... + 101081071.

It is an arithmetic number, because the mean of its divisors is an integer number (454864779).

Almost surely, 2^2021621230 is an apocalyptic number.

2021621230 is a deficient number, since it is larger than the sum of its proper divisors (1617297002).

2021621230 is a wasteful number, since it uses less digits than its factorization.

2021621230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202162130.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2021621230 is about 44962.4424381061. The cubic root of 2021621230 is about 1264.4449605628. Note that the first 3 decimals are identical.

Adding to 2021621230 its reverse (321261202), we get a palindrome (2342882432).

The spelling of 2021621230 in words is "two billion, twenty-one million, six hundred twenty-one thousand, two hundred thirty".