2021042290 has 32 divisors (see below), whose sum is σ = 3686705280. Its totient is φ = 797631744.

The previous prime is 2021042279. The next prime is 2021042291. The reversal of 2021042290 is 922401202.

It is a super-2 number, since 2×2021042290² = 8169223875936888200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021042291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252571 + ... + 260449.

It is an arithmetic number, because the mean of its divisors is an integer number (115209540).

Almost surely, 2^2021042290 is an apocalyptic number.

2021042290 is a deficient number, since it is larger than the sum of its proper divisors (1665662990).

2021042290 is a wasteful number, since it uses less digits than its factorization.

2021042290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8226.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2021042290 is about 44956.0039371829. The cubic root of 2021042290 is about 1264.3242476016.

Adding to 2021042290 its reverse (922401202), we get a palindrome (2943443492).

It can be divided in two parts, 20210 and 42290, that added together give a square (62500 = 250²).

The spelling of 2021042290 in words is "two billion, twenty-one million, forty-two thousand, two hundred ninety".