221020022 has 4 divisors (see below), whose sum is σ = 331530036. Its totient is φ = 110510010.

The previous prime is 221020003. The next prime is 221020039. The reversal of 221020022 is 220020122.

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

It is a junction number, because it is equal to n+sod(n) for n = 221019985 and 221020012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255004 + ... + 55255007.

It is an arithmetic number, because the mean of its divisors is an integer number (82882509).

Almost surely, 2^221020022 is an apocalyptic number.

221020022 is a deficient number, since it is larger than the sum of its proper divisors (110510014).

221020022 is a wasteful number, since it uses less digits than its factorization.

221020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110510013.

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

The square root of 221020022 is about 14866.7421448009. The cubic root of 221020022 is about 604.6126172524.

Adding to 221020022 its reverse (220020122), we get a palindrome (441040144).

The spelling of 221020022 in words is "two hundred twenty-one million, twenty thousand, twenty-two".