222221010021121 has 4 divisors (see below), whose sum is σ = 222258693766212. Its totient is φ = 222183326276032.

The previous prime is 222221010021103. The next prime is 222221010021247. The reversal of 222221010021121 is 121120010122222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 217658680627600 + 4562329393521 = 14753260^2 + 2135961^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221010021121 - 2⁵ = 222221010021089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222221010021421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18841863700 + ... + 18841875493.

It is an arithmetic number, because the mean of its divisors is an integer number (55564673441553).

Almost surely, 2^{222221010021121} is an apocalyptic number.

It is an amenable number.

222221010021121 is a deficient number, since it is larger than the sum of its proper divisors (37683745091).

222221010021121 is an equidigital number, since it uses as much as digits as its factorization.

222221010021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37683745090.

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

Adding to 222221010021121 its reverse (121120010122222), we get a palindrome (343341020143343).

The spelling of 222221010021121 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, ten million, twenty-one thousand, one hundred twenty-one".