221202200221 has 4 divisors (see below), whose sum is σ = 221203461472. Its totient is φ = 221200938972.

The previous prime is 221202200203. The next prime is 221202200243. The reversal of 221202200221 is 122002202122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221202200221 - 2⁵ = 221202200189 is a prime.

It is a super-2 number, since 2×221202200221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221202200195 and 221202200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202200201) 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, 314841 + ... + 735886.

It is an arithmetic number, because the mean of its divisors is an integer number (55300865368).

Almost surely, 2^221202200221 is an apocalyptic number.

It is an amenable number.

221202200221 is a deficient number, since it is larger than the sum of its proper divisors (1261251).

221202200221 is a wasteful number, since it uses less digits than its factorization.

221202200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261250.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221202200221 its reverse (122002202122), we get a palindrome (343204402343).

The spelling of 221202200221 in words is "two hundred twenty-one billion, two hundred two million, two hundred thousand, two hundred twenty-one".