222100010202121 has 4 divisors (see below), whose sum is σ = 222105930222852. Its totient is φ = 222094090181392.

The previous prime is 222100010202071. The next prime is 222100010202131. The reversal of 222100010202121 is 121202010001222.

It is a happy number.

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 40034535471225 + 182065474730896 = 6327285^2 + 13493164^2 .

It is a cyclic number.

It is not a de Polignac number, because 222100010202121 - 2⁴⁵ = 186915638113289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222100010202095 and 222100010202104.

It is not an unprimeable number, because it can be changed into a prime (222100010202131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2959954090 + ... + 2960029123.

It is an arithmetic number, because the mean of its divisors is an integer number (55526482555713).

Almost surely, 2^{222100010202121} is an apocalyptic number.

It is an amenable number.

222100010202121 is a deficient number, since it is larger than the sum of its proper divisors (5920020731).

222100010202121 is an equidigital number, since it uses as much as digits as its factorization.

222100010202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5920020730.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222100010202121 its reverse (121202010001222), we get a palindrome (343302020203343).

The spelling of 222100010202121 in words is "two hundred twenty-two trillion, one hundred billion, ten million, two hundred two thousand, one hundred twenty-one".