221221020019 has 16 divisors (see below), whose sum is σ = 227779524000. Its totient is φ = 214693749504.

The previous prime is 221221019993. The next prime is 221221020173. The reversal of 221221020019 is 910020122122.

221221020019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221221020019 - 2¹¹ = 221221017971 is a prime.

It is a super-2 number, since 2×221221020019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221024019) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 26272192 + ... + 26280610.

It is an arithmetic number, because the mean of its divisors is an integer number (14236220250).

Almost surely, 2^221221020019 is an apocalyptic number.

221221020019 is a deficient number, since it is larger than the sum of its proper divisors (6558503981).

221221020019 is a wasteful number, since it uses less digits than its factorization.

221221020019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10182.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 221221020019 in words is "two hundred twenty-one billion, two hundred twenty-one million, twenty thousand, nineteen".