2212202012121 has 12 divisors (see below), whose sum is σ = 3195476961300. Its totient is φ = 1474767162240.

The previous prime is 2212202012107. The next prime is 2212202012143. The reversal of 2212202012121 is 1212102022122.

It is a happy number.

2212202012121 is a `hidden beast` number, since 221 + 220 + 201 + 2 + 1 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 797198979600 + 1415003032521 = 892860^2 + 1189539^2 .

It is not a de Polignac number, because 2212202012121 - 2¹⁵ = 2212201979353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212202012094 and 2212202012103.

It is not an unprimeable number, because it can be changed into a prime (2212202013121) 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 11 ways as a sum of consecutive naturals, for example, 2435196 + ... + 3217853.

It is an arithmetic number, because the mean of its divisors is an integer number (266289746775).

Almost surely, 2^{2212202012121} is an apocalyptic number.

It is an amenable number.

2212202012121 is a deficient number, since it is larger than the sum of its proper divisors (983274949179).

2212202012121 is a wasteful number, since it uses less digits than its factorization.

2212202012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696536 (or 5696533 counting only the distinct ones).

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

Adding to 2212202012121 its reverse (1212102022122), we get a palindrome (3424304034243).

The spelling of 2212202012121 in words is "two trillion, two hundred twelve billion, two hundred two million, twelve thousand, one hundred twenty-one".