2112022212121 has 8 divisors (see below), whose sum is σ = 2290801711464. Its totient is φ = 1939303034880.

The previous prime is 2112022212119. The next prime is 2112022212137. The reversal of 2112022212121 is 1212122202112.

It can be written as a sum of positive squares in 4 ways, for example, as 601431270400 + 1510590941721 = 775520^2 + 1229061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2112022212121 - 2¹ = 2112022212119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112022212161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515079800 + ... + 1515081193.

It is an arithmetic number, because the mean of its divisors is an integer number (286350213933).

Almost surely, 2^{2112022212121} is an apocalyptic number.

It is an amenable number.

2112022212121 is a deficient number, since it is larger than the sum of its proper divisors (178779499343).

2112022212121 is a wasteful number, since it uses less digits than its factorization.

2112022212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030161051.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2112022212121 its reverse (1212122202112), we get a palindrome (3324144414233).

The spelling of 2112022212121 in words is "two trillion, one hundred twelve billion, twenty-two million, two hundred twelve thousand, one hundred twenty-one".