221200211021 has 8 divisors (see below), whose sum is σ = 228030869760. Its totient is φ = 214472269152.

The previous prime is 221200210963. The next prime is 221200211039. The reversal of 221200211021 is 120112002122.

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-221200211021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221200210987 and 221200211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200211041) 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, 25674845 + ... + 25683458.

It is an arithmetic number, because the mean of its divisors is an integer number (28503858720).

Almost surely, 2^221200211021 is an apocalyptic number.

It is an amenable number.

221200211021 is a deficient number, since it is larger than the sum of its proper divisors (6830658739).

221200211021 is an equidigital number, since it uses as much as digits as its factorization.

221200211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51358435.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221200211021 its reverse (120112002122), we get a palindrome (341312213143).

The spelling of 221200211021 in words is "two hundred twenty-one billion, two hundred million, two hundred eleven thousand, twenty-one".