221021022 has 8 divisors (see below), whose sum is σ = 442042056. Its totient is φ = 73673672.

The previous prime is 221020957. The next prime is 221021033. The reversal of 221021022 is 220120122.

221021022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

221021022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 221020989 and 221021007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18418413 + ... + 18418424.

It is an arithmetic number, because the mean of its divisors is an integer number (55255257).

Almost surely, 2^221021022 is an apocalyptic number.

221021022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221021022 is a wasteful number, since it uses less digits than its factorization.

221021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36836842.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 221021022 is about 14866.7757768791. The cubic root of 221021022 is about 604.6135291030.

Adding to 221021022 its reverse (220120122), we get a palindrome (441141144).

It can be divided in two parts, 2210 and 21022, that added together give a palindrome (23232).

The spelling of 221021022 in words is "two hundred twenty-one million, twenty-one thousand, twenty-two".