221032002221 has 4 divisors (see below), whose sum is σ = 222142716000. Its totient is φ = 219921288444.

The previous prime is 221032002209. The next prime is 221032002277. The reversal of 221032002221 is 122200230122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122200230122 = 2 ⋅61100115061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221032002221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221032002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221032001221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555356591 + ... + 555356988.

It is an arithmetic number, because the mean of its divisors is an integer number (55535679000).

Almost surely, 2^221032002221 is an apocalyptic number.

It is an amenable number.

221032002221 is a deficient number, since it is larger than the sum of its proper divisors (1110713779).

221032002221 is a wasteful number, since it uses less digits than its factorization.

221032002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110713778.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 221032002221 its reverse (122200230122), we get a palindrome (343232232343).

The spelling of 221032002221 in words is "two hundred twenty-one billion, thirty-two million, two thousand, two hundred twenty-one".