22002111212221 has 16 divisors (see below), whose sum is σ = 26626701746304. Its totient is φ = 17748070147584.

The previous prime is 22002111212219. The next prime is 22002111212273. The reversal of 22002111212221 is 12221211120022.

It is not a de Polignac number, because 22002111212221 - 2¹ = 22002111212219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002111215221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6594715 + ... + 9353848.

It is an arithmetic number, because the mean of its divisors is an integer number (1664168859144).

Almost surely, 2^{22002111212221} is an apocalyptic number.

It is an amenable number.

22002111212221 is a deficient number, since it is larger than the sum of its proper divisors (4624590534083).

22002111212221 is a wasteful number, since it uses less digits than its factorization.

22002111212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15960180.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22002111212221 its reverse (12221211120022), we get a palindrome (34223322332243).

The spelling of 22002111212221 in words is "twenty-two trillion, two billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-one".