221011002 has 48 divisors (see below), whose sum is σ = 525994560. Its totient is φ = 66756096.

The previous prime is 221010971. The next prime is 221011057. The reversal of 221011002 is 200110122.

221011002 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6183 + ... + 21914.

It is an arithmetic number, because the mean of its divisors is an integer number (10958220).

Almost surely, 2^221011002 is an apocalyptic number.

221011002 is an abundant number, since it is smaller than the sum of its proper divisors (304983558).

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

221011002 is a wasteful number, since it uses less digits than its factorization.

221011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28147 (or 28144 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 221011002 is about 14866.4387800172. The cubic root of 221011002 is about 604.6043922359.

Adding to 221011002 its reverse (200110122), we get a palindrome (421121124).

The spelling of 221011002 in words is "two hundred twenty-one million, eleven thousand, two".