2222121002121 has 24 divisors (see below), whose sum is σ = 3214598052224. Its totient is φ = 1479168643680.

The previous prime is 2222121002117. The next prime is 2222121002131. The reversal of 2222121002121 is 1212001212222.

It is a happy number.

2222121002121 is a `hidden beast` number, since 22 + 221 + 210 + 0 + 212 + 1 = 666.

It is not a de Polignac number, because 2222121002121 - 2² = 2222121002117 is a prime.

It is a super-3 number, since 3×2222121002121³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222121002094 and 2222121002103.

It is not an unprimeable number, because it can be changed into a prime (2222121002131) 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 23 ways as a sum of consecutive naturals, for example, 21504240 + ... + 21607326.

Almost surely, 2^{2222121002121} is an apocalyptic number.

It is an amenable number.

2222121002121 is a deficient number, since it is larger than the sum of its proper divisors (992477050103).

2222121002121 is a wasteful number, since it uses less digits than its factorization.

2222121002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106701 (or 106698 counting only the distinct ones).

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

Adding to 2222121002121 its reverse (1212001212222), we get a palindrome (3434122214343).

The spelling of 2222121002121 in words is "two trillion, two hundred twenty-two billion, one hundred twenty-one million, two thousand, one hundred twenty-one".