221012001202111 has 4 divisors (see below), whose sum is σ = 252585144230992. Its totient is φ = 189438858173232.

The previous prime is 221012001202079. The next prime is 221012001202177. The reversal of 221012001202111 is 111202100210122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221012001202111 - 2⁵ = 221012001202079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012001206111) 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, 15786571514430 + ... + 15786571514443.

It is an arithmetic number, because the mean of its divisors is an integer number (63146286057748).

Almost surely, 2^{221012001202111} is an apocalyptic number.

221012001202111 is a deficient number, since it is larger than the sum of its proper divisors (31573143028881).

221012001202111 is an equidigital number, since it uses as much as digits as its factorization.

221012001202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31573143028880.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221012001202111 its reverse (111202100210122), we get a palindrome (332214101412233).

The spelling of 221012001202111 in words is "two hundred twenty-one trillion, twelve billion, one million, two hundred two thousand, one hundred eleven".