22102102222221 has 16 divisors (see below), whose sum is σ = 33679698758784. Its totient is φ = 12629658362304.

The previous prime is 22102102222199. The next prime is 22102102222267. The reversal of 22102102222221 is 12222220120122.

It is not a de Polignac number, because 22102102222221 - 2¹³ = 22102102214029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102102222271) 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, 2360886 + ... + 7055351.

It is an arithmetic number, because the mean of its divisors is an integer number (2104981172424).

Almost surely, 2^{22102102222221} is an apocalyptic number.

22102102222221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22102102222221 is a deficient number, since it is larger than the sum of its proper divisors (11577596536563).

22102102222221 is a wasteful number, since it uses less digits than its factorization.

22102102222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9528020.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22102102222221 its reverse (12222220120122), we get a palindrome (34324322342343).

The spelling of 22102102222221 in words is "twenty-two trillion, one hundred two billion, one hundred two million, two hundred twenty-two thousand, two hundred twenty-one".