2021423331 has 8 divisors (see below), whose sum is σ = 2768075344. Its totient is φ = 1311193440.

The previous prime is 2021423317. The next prime is 2021423359. The reversal of 2021423331 is 1333241202.

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

It is not a de Polignac number, because 2021423331 - 2¹⁰ = 2021422307 is a prime.

It is a super-2 number, since 2×2021423331² = 8172304566222271122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 2021423298 and 2021423307.

It is not an unprimeable number, because it can be changed into a prime (2021423431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9105400 + ... + 9105621.

It is an arithmetic number, because the mean of its divisors is an integer number (346009418).

Almost surely, 2^2021423331 is an apocalyptic number.

2021423331 is a deficient number, since it is larger than the sum of its proper divisors (746652013).

2021423331 is a wasteful number, since it uses less digits than its factorization.

2021423331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18211061.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2021423331 is about 44960.2416697242. The cubic root of 2021423331 is about 1264.4036998566.

Adding to 2021423331 its reverse (1333241202), we get a palindrome (3354664533).

The spelling of 2021423331 in words is "two billion, twenty-one million, four hundred twenty-three thousand, three hundred thirty-one".