22002121210221 has 48 divisors (see below), whose sum is σ = 34202338739712. Its totient is φ = 13603202121600.

The previous prime is 22002121210171. The next prime is 22002121210241. The reversal of 22002121210221 is 12201212120022.

It is a happy number.

22002121210221 is a `hidden beast` number, since 2 + 20 + 0 + 212 + 1 + 210 + 221 = 666.

It is not a de Polignac number, because 22002121210221 - 2¹⁸ = 22002120948077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22002121210194 and 22002121210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002121210241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16665750 + ... + 17937431.

It is an arithmetic number, because the mean of its divisors is an integer number (712548723744).

Almost surely, 2^{22002121210221} is an apocalyptic number.

It is an amenable number.

22002121210221 is a deficient number, since it is larger than the sum of its proper divisors (12200217529491).

22002121210221 is a wasteful number, since it uses less digits than its factorization.

22002121210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34603314 (or 34603311 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22002121210221 its reverse (12201212120022), we get a palindrome (34203333330243).

The spelling of 22002121210221 in words is "twenty-two trillion, two billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".