221002022 has 4 divisors (see below), whose sum is σ = 331503036. Its totient is φ = 110501010.

The previous prime is 221002021. The next prime is 221002031. The reversal of 221002022 is 220200122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220200122 = 2 ⋅110100061.

It is a junction number, because it is equal to n+sod(n) for n = 221001994 and 221002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55250504 + ... + 55250507.

It is an arithmetic number, because the mean of its divisors is an integer number (82875759).

Almost surely, 2^221002022 is an apocalyptic number.

221002022 is a deficient number, since it is larger than the sum of its proper divisors (110501014).

221002022 is a wasteful number, since it uses less digits than its factorization.

221002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110501013.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 221002022 is about 14866.1367543824. The cubic root of 221002022 is about 604.5962034716.

Adding to 221002022 its reverse (220200122), we get a palindrome (441202144).

The spelling of 221002022 in words is "two hundred twenty-one million, two thousand, twenty-two".