221201122011 has 8 divisors (see below), whose sum is σ = 302906041104. Its totient is φ = 143481808800.

The previous prime is 221201122007. The next prime is 221201122033. The reversal of 221201122011 is 110221102122.

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

It is not a de Polignac number, because 221201122011 - 2² = 221201122007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221201122411) 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, 996401340 + ... + 996401561.

It is an arithmetic number, because the mean of its divisors is an integer number (37863255138).

Almost surely, 2^221201122011 is an apocalyptic number.

221201122011 is a deficient number, since it is larger than the sum of its proper divisors (81704919093).

221201122011 is a wasteful number, since it uses less digits than its factorization.

221201122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992802941.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221201122011 its reverse (110221102122), we get a palindrome (331422224133).

The spelling of 221201122011 in words is "two hundred twenty-one billion, two hundred one million, one hundred twenty-two thousand, eleven".