201221021002111 has 8 divisors (see below), whose sum is σ = 232426419981264. Its totient is φ = 172167718504320.

The previous prime is 201221021002033. The next prime is 201221021002249. The reversal of 201221021002111 is 111200120122102.

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

It is not a de Polignac number, because 201221021002111 - 2⁷ = 201221021001983 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 (201221021002811) 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, 538024120140 + ... + 538024120513.

It is an arithmetic number, because the mean of its divisors is an integer number (29053302497658).

Almost surely, 2^{201221021002111} is an apocalyptic number.

201221021002111 is a deficient number, since it is larger than the sum of its proper divisors (31205398979153).

201221021002111 is a wasteful number, since it uses less digits than its factorization.

201221021002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076048240681.

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

Adding to 201221021002111 its reverse (111200120122102), we get a palindrome (312421141124213).

The spelling of 201221021002111 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-one million, two thousand, one hundred eleven".