2222002012121 has 16 divisors (see below), whose sum is σ = 2357710583184. Its totient is φ = 2086852399104.

The previous prime is 2222002012051. The next prime is 2222002012123. The reversal of 2222002012121 is 1212102002222.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 375566737225 + 1846435274896 = 612835^2 + 1358836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2222002012121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2222002012121.

It is not an unprimeable number, because it can be changed into a prime (2222002012123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23471735 + ... + 23566211.

It is an arithmetic number, because the mean of its divisors is an integer number (147356911449).

Almost surely, 2^{2222002012121} is an apocalyptic number.

It is an amenable number.

2222002012121 is a deficient number, since it is larger than the sum of its proper divisors (135708571063).

2222002012121 is a wasteful number, since it uses less digits than its factorization.

2222002012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97420.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2222002012121 its reverse (1212102002222), we get a palindrome (3434104014343).

The spelling of 2222002012121 in words is "two trillion, two hundred twenty-two billion, two million, twelve thousand, one hundred twenty-one".