221120210200021 has 8 divisors (see below), whose sum is σ = 243121433693184. Its totient is φ = 199435551073920.

The previous prime is 221120210200009. The next prime is 221120210200091. The reversal of 221120210200021 is 120002012021122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221120210200021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221120210199968 and 221120210200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120210200091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79141090300 + ... + 79141093093.

It is an arithmetic number, because the mean of its divisors is an integer number (30390179211648).

Almost surely, 2^{221120210200021} is an apocalyptic number.

It is an amenable number.

221120210200021 is a deficient number, since it is larger than the sum of its proper divisors (22001223493163).

221120210200021 is a wasteful number, since it uses less digits than its factorization.

221120210200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158282183531.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221120210200021 its reverse (120002012021122), we get a palindrome (341122222221143).

The spelling of 221120210200021 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred thousand, twenty-one".