2112102212021 has 4 divisors (see below), whose sum is σ = 2112986309100. Its totient is φ = 2111218114944.

The previous prime is 2112102211987. The next prime is 2112102212029. The reversal of 2112102212021 is 1202122012112.

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 1259083723921 + 853018488100 = 1122089^2 + 923590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112102212021 - 2²² = 2112098017717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112102212029) 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, 442044956 + ... + 442049733.

It is an arithmetic number, because the mean of its divisors is an integer number (528246577275).

Almost surely, 2^{2112102212021} is an apocalyptic number.

It is an amenable number.

2112102212021 is a deficient number, since it is larger than the sum of its proper divisors (884097079).

2112102212021 is an equidigital number, since it uses as much as digits as its factorization.

2112102212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884097078.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2112102212021 its reverse (1202122012112), we get a palindrome (3314224224133).

The spelling of 2112102212021 in words is "two trillion, one hundred twelve billion, one hundred two million, two hundred twelve thousand, twenty-one".