221012210111201 has 4 divisors (see below), whose sum is σ = 222169342101504. Its totient is φ = 219855078120900.

The previous prime is 221012210111191. The next prime is 221012210111249. The reversal of 221012210111201 is 102111012210122.

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 221012210111201 - 2⁶ = 221012210111137 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 221012210111201.

It is not an unprimeable number, because it can be changed into a prime (221012210111281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578565994865 + ... + 578565995246.

It is an arithmetic number, because the mean of its divisors is an integer number (55542335525376).

Almost surely, 2^{221012210111201} is an apocalyptic number.

It is an amenable number.

221012210111201 is a deficient number, since it is larger than the sum of its proper divisors (1157131990303).

221012210111201 is a wasteful number, since it uses less digits than its factorization.

221012210111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157131990302.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221012210111201 its reverse (102111012210122), we get a palindrome (323123222321323).

The spelling of 221012210111201 in words is "two hundred twenty-one trillion, twelve billion, two hundred ten million, one hundred eleven thousand, two hundred one".