222202012122121 has 4 divisors (see below), whose sum is σ = 226394502916932. Its totient is φ = 218009521327312.

The previous prime is 222202012122091. The next prime is 222202012122173. The reversal of 222202012122121 is 121221210202222.

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 76960949562121 + 145241062560000 = 8772739^2 + 12051600^2 .

It is a cyclic number.

It is not a de Polignac number, because 222202012122121 - 2²⁷ = 222201877904393 is a prime.

It is a super-2 number, since 2×222202012122121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222202012122092 and 222202012122101.

It is not an unprimeable number, because it can be changed into a prime (222202012122721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2096245397326 + ... + 2096245397431.

It is an arithmetic number, because the mean of its divisors is an integer number (56598625729233).

Almost surely, 2^{222202012122121} is an apocalyptic number.

It is an amenable number.

222202012122121 is a deficient number, since it is larger than the sum of its proper divisors (4192490794811).

222202012122121 is an equidigital number, since it uses as much as digits as its factorization.

222202012122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192490794810.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222202012122121 its reverse (121221210202222), we get a palindrome (343423222324343).

The spelling of 222202012122121 in words is "two hundred twenty-two trillion, two hundred two billion, twelve million, one hundred twenty-two thousand, one hundred twenty-one".