22112101221 has 32 divisors (see below), whose sum is σ = 35514236160. Its totient is φ = 11969577984.

The previous prime is 22112101211. The next prime is 22112101223. The reversal of 22112101221 is 12210121122.

It is not a de Polignac number, because 22112101221 - 2¹¹ = 22112099173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22112101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112101223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310260 + ... + 374813.

It is an arithmetic number, because the mean of its divisors is an integer number (1109819880).

Almost surely, 2^22112101221 is an apocalyptic number.

22112101221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22112101221 is a deficient number, since it is larger than the sum of its proper divisors (13402134939).

22112101221 is a wasteful number, since it uses less digits than its factorization.

22112101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685165.

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

Adding to 22112101221 its reverse (12210121122), we get a palindrome (34322222343).

The spelling of 22112101221 in words is "twenty-two billion, one hundred twelve million, one hundred one thousand, two hundred twenty-one".