221021200011 has 8 divisors (see below), whose sum is σ = 298425249280. Its totient is φ = 145482308712.

The previous prime is 221021199991. The next prime is 221021200069. The reversal of 221021200011 is 110002120122.

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

It is not a de Polignac number, because 221021200011 - 2²² = 221017005707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221021200011.

It is not an unprimeable number, because it can be changed into a prime (221021200111) 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, 466289215 + ... + 466289688.

It is an arithmetic number, because the mean of its divisors is an integer number (37303156160).

Almost surely, 2^221021200011 is an apocalyptic number.

221021200011 is a deficient number, since it is larger than the sum of its proper divisors (77404049269).

221021200011 is an equidigital number, since it uses as much as digits as its factorization.

221021200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932578985.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221021200011 its reverse (110002120122), we get a palindrome (331023320133).

The spelling of 221021200011 in words is "two hundred twenty-one billion, twenty-one million, two hundred thousand, eleven".