201221102011 has 8 divisors (see below), whose sum is σ = 201986987184. Its totient is φ = 200455570560.

The previous prime is 201221102009. The next prime is 201221102053. The reversal of 201221102011 is 110201122102.

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

It is a cyclic number.

It is not a de Polignac number, because 201221102011 - 2¹ = 201221102009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201221101982 and 201221102000.

It is not an unprimeable number, because it can be changed into a prime (201221102081) 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, 1080780 + ... + 1253206.

It is an arithmetic number, because the mean of its divisors is an integer number (25248373398).

Almost surely, 2^201221102011 is an apocalyptic number.

201221102011 is a deficient number, since it is larger than the sum of its proper divisors (765885173).

201221102011 is a wasteful number, since it uses less digits than its factorization.

201221102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176861.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201221102011 its reverse (110201122102), we get a palindrome (311422224113).

The spelling of 201221102011 in words is "two hundred one billion, two hundred twenty-one million, one hundred two thousand, eleven".