221132312211 has 16 divisors (see below), whose sum is σ = 314208359424. Its totient is φ = 138011653824.

The previous prime is 221132312209. The next prime is 221132312329. The reversal of 221132312211 is 112213231122.

It is not a de Polignac number, because 221132312211 - 2¹ = 221132312209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221132312201) 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, 34090546 + ... + 34097031.

It is an arithmetic number, because the mean of its divisors is an integer number (19638022464).

Almost surely, 2^221132312211 is an apocalyptic number.

221132312211 is a deficient number, since it is larger than the sum of its proper divisors (93076047213).

221132312211 is a wasteful number, since it uses less digits than its factorization.

221132312211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68187650.

The product of its digits is 288, while the sum is 21.

Adding to 221132312211 its reverse (112213231122), we get a palindrome (333345543333).

The spelling of 221132312211 in words is "two hundred twenty-one billion, one hundred thirty-two million, three hundred twelve thousand, two hundred eleven".