2220002121121 has 4 divisors (see below), whose sum is σ = 2241982340244. Its totient is φ = 2198021902000.

The previous prime is 2220002121089. The next prime is 2220002121131. The reversal of 2220002121121 is 1211212000222.

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 2022809285025 + 197192836096 = 1422255^2 + 444064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220002121121 - 2⁵ = 2220002121089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220002121095 and 2220002121104.

It is not an unprimeable number, because it can be changed into a prime (2220002121131) 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, 10990109410 + ... + 10990109611.

It is an arithmetic number, because the mean of its divisors is an integer number (560495585061).

Almost surely, 2^{2220002121121} is an apocalyptic number.

It is an amenable number.

2220002121121 is a deficient number, since it is larger than the sum of its proper divisors (21980219123).

2220002121121 is a wasteful number, since it uses less digits than its factorization.

2220002121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21980219122.

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

Adding to 2220002121121 its reverse (1211212000222), we get a palindrome (3431214121343).

The spelling of 2220002121121 in words is "two trillion, two hundred twenty billion, two million, one hundred twenty-one thousand, one hundred twenty-one".