2002023221 has 16 divisors (see below), whose sum is σ = 2205439488. Its totient is φ = 1802262000.

The previous prime is 2002023209. The next prime is 2002023229. The reversal of 2002023221 is 1223202002.

It is not a de Polignac number, because 2002023221 - 2²⁶ = 1934914357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002023196 and 2002023205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002023229) 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, 517946 + ... + 521796.

It is an arithmetic number, because the mean of its divisors is an integer number (137839968).

Almost surely, 2^2002023221 is an apocalyptic number.

It is an amenable number.

2002023221 is a deficient number, since it is larger than the sum of its proper divisors (203416267).

2002023221 is a wasteful number, since it uses less digits than its factorization.

2002023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2002023221 is about 44743.9741306022. The cubic root of 2002023221 is about 1260.3457565022.

Adding to 2002023221 its reverse (1223202002), we get a palindrome (3225225223).

The spelling of 2002023221 in words is "two billion, two million, twenty-three thousand, two hundred twenty-one".