221120121221211 has 16 divisors (see below), whose sum is σ = 295031395159200. Its totient is φ = 147311156379648.

The previous prime is 221120121221191. The next prime is 221120121221227. The reversal of 221120121221211 is 112122121021122.

It is not a de Polignac number, because 221120121221211 - 2¹⁷ = 221120121090139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221120121221231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31302315 + ... + 37710411.

It is an arithmetic number, because the mean of its divisors is an integer number (18439462197450).

Almost surely, 2^{221120121221211} is an apocalyptic number.

221120121221211 is a deficient number, since it is larger than the sum of its proper divisors (73911273937989).

221120121221211 is a wasteful number, since it uses less digits than its factorization.

221120121221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6416078.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221120121221211 its reverse (112122121021122), we get a palindrome (333242242242333).

The spelling of 221120121221211 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".