4022252021 has 4 divisors (see below), whose sum is σ = 4022702700. Its totient is φ = 4021801344.

The previous prime is 4022252009. The next prime is 4022252041. The reversal of 4022252021 is 1202522204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2018704900 + 2003547121 = 44930^2 + 44761^2 .

It is a cyclic number.

It is not a de Polignac number, because 4022252021 - 2¹⁸ = 4021989877 is a prime.

It is a super-2 number, since 2×4022252021² = 32357022640877168882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4022251984 and 4022252002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4022252041) 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, 211676 + ... + 229893.

It is an arithmetic number, because the mean of its divisors is an integer number (1005675675).

Almost surely, 2^4022252021 is an apocalyptic number.

It is an amenable number.

4022252021 is a deficient number, since it is larger than the sum of its proper divisors (450679).

4022252021 is an equidigital number, since it uses as much as digits as its factorization.

4022252021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450678.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 4022252021 is about 63421.2268960480. The cubic root of 4022252021 is about 1590.3391838658.

Adding to 4022252021 its reverse (1202522204), we get a palindrome (5224774225).

The spelling of 4022252021 in words is "four billion, twenty-two million, two hundred fifty-two thousand, twenty-one".