22002221212221 has 8 divisors (see below), whose sum is σ = 29547347431840. Its totient is φ = 14562621233712.

The previous prime is 22002221212219. The next prime is 22002221212273. The reversal of 22002221212221 is 12221212220022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22002221212221 - 2¹ = 22002221212219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002221212291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26381559790 + ... + 26381560623.

It is an arithmetic number, because the mean of its divisors is an integer number (3693418428980).

Almost surely, 2^{22002221212221} is an apocalyptic number.

It is an amenable number.

22002221212221 is a deficient number, since it is larger than the sum of its proper divisors (7545126219619).

22002221212221 is a wasteful number, since it uses less digits than its factorization.

22002221212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52763120555.

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

Adding to 22002221212221 its reverse (12221212220022), we get a palindrome (34223433432243).

The spelling of 22002221212221 in words is "twenty-two trillion, two billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty-one".