221102200021 has 8 divisors (see below), whose sum is σ = 222277423104. Its totient is φ = 219927511440.

The previous prime is 221102199979. The next prime is 221102200031. The reversal of 221102200021 is 120002201122.

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-221102200021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221102199974 and 221102200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102200031) 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, 709996 + ... + 972778.

It is an arithmetic number, because the mean of its divisors is an integer number (27784677888).

Almost surely, 2^221102200021 is an apocalyptic number.

It is an amenable number.

221102200021 is a deficient number, since it is larger than the sum of its proper divisors (1175223083).

221102200021 is a wasteful number, since it uses less digits than its factorization.

221102200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267251.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221102200021 its reverse (120002201122), we get a palindrome (341104401143).

The spelling of 221102200021 in words is "two hundred twenty-one billion, one hundred two million, two hundred thousand, twenty-one".