4002211021 has 4 divisors (see below), whose sum is σ = 4052872000. Its totient is φ = 3951550044.

The previous prime is 4002211001. The next prime is 4002211093. The reversal of 4002211021 is 1201122004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4002211021 - 2¹³ = 4002202829 is a prime.

It is a super-2 number, since 2×4002211021² = 32035386113227724882, 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 = 4002210992 and 4002211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002211001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25330371 + ... + 25330528.

It is an arithmetic number, because the mean of its divisors is an integer number (1013218000).

Almost surely, 2^4002211021 is an apocalyptic number.

It is an amenable number.

4002211021 is a deficient number, since it is larger than the sum of its proper divisors (50660979).

4002211021 is an equidigital number, since it uses as much as digits as its factorization.

4002211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50660978.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 4002211021 is about 63263.0304443282. The cubic root of 4002211021 is about 1587.6934795163.

Adding to 4002211021 its reverse (1201122004), we get a palindrome (5203333025).

The spelling of 4002211021 in words is "four billion, two million, two hundred eleven thousand, twenty-one".