221019390102 has 24 divisors (see below), whose sum is σ = 514208377656. Its totient is φ = 63148397088.

The previous prime is 221019390083. The next prime is 221019390107. The reversal of 221019390102 is 201093910122.

It is a self number, because there is not a number n which added to its sum of digits gives 221019390102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221019390107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375883023 + ... + 375883610.

It is an arithmetic number, because the mean of its divisors is an integer number (21425349069).

Almost surely, 2^221019390102 is an apocalyptic number.

221019390102 is an abundant number, since it is smaller than the sum of its proper divisors (293188987554).

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

221019390102 is a wasteful number, since it uses less digits than its factorization.

221019390102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751766652 (or 751766645 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 221019390102 in words is "two hundred twenty-one billion, nineteen million, three hundred ninety thousand, one hundred two".