221000011002 has 24 divisors (see below), whose sum is σ = 478903193184. Its totient is φ = 73655926344.

The previous prime is 221000010991. The next prime is 221000011049. The reversal of 221000011002 is 200110000122.

221000011002 is digitally balanced in base 2, because in such base 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 767998 + ... + 1015785.

It is an arithmetic number, because the mean of its divisors is an integer number (19954299716).

Almost surely, 2^221000011002 is an apocalyptic number.

221000011002 is an abundant number, since it is smaller than the sum of its proper divisors (257903182182).

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

221000011002 is a wasteful number, since it uses less digits than its factorization.

221000011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790674 (or 1790671 counting only the distinct ones).

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

Adding to 221000011002 its reverse (200110000122), we get a palindrome (421110011124).

The spelling of 221000011002 in words is "two hundred twenty-one billion, eleven thousand, two".