2222201012121 has 6 divisors (see below), whose sum is σ = 3209845906410. Its totient is φ = 1481467341408.

The previous prime is 2222201012117. The next prime is 2222201012131. The reversal of 2222201012121 is 1212101022222.

It is a happy number.

2222201012121 is a `hidden beast` number, since 222 + 220 + 10 + 1 + 212 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1922559726096 + 299641286025 = 1386564^2 + 547395^2 .

It is not a de Polignac number, because 2222201012121 - 2² = 2222201012117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2222201012094 and 2222201012103.

It is not an unprimeable number, because it can be changed into a prime (2222201012131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123455611776 + ... + 123455611793.

It is an arithmetic number, because the mean of its divisors is an integer number (534974317735).

Almost surely, 2^{2222201012121} is an apocalyptic number.

It is an amenable number.

2222201012121 is a deficient number, since it is larger than the sum of its proper divisors (987644894289).

2222201012121 is a wasteful number, since it uses less digits than its factorization.

2222201012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246911223575 (or 246911223572 counting only the distinct ones).

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

Adding to 2222201012121 its reverse (1212101022222), we get a palindrome (3434302034343).

It can be divided in two parts, 222220101 and 2121, that added together give a palindrome (222222222).

The spelling of 2222201012121 in words is "two trillion, two hundred twenty-two billion, two hundred one million, twelve thousand, one hundred twenty-one".