222121010220121 has 8 divisors (see below), whose sum is σ = 222511224408200. Its totient is φ = 221730864566400.

The previous prime is 222121010220113. The next prime is 222121010220127. The reversal of 222121010220121 is 121022010121222.

It can be written as a sum of positive squares in 4 ways, for example, as 74032068347721 + 148088941872400 = 8604189^2 + 12169180^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 222121010220121 - 2³ = 222121010220113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121010220127) 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, 10643706 + ... + 23612083.

It is an arithmetic number, because the mean of its divisors is an integer number (27813903051025).

Almost surely, 2^{222121010220121} is an apocalyptic number.

It is an amenable number.

222121010220121 is a deficient number, since it is larger than the sum of its proper divisors (390214188079).

222121010220121 is a wasteful number, since it uses less digits than its factorization.

222121010220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34267179.

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

Adding to 222121010220121 its reverse (121022010121222), we get a palindrome (343143020341343).

The spelling of 222121010220121 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, ten million, two hundred twenty thousand, one hundred twenty-one".