2112021210021 has 4 divisors (see below), whose sum is σ = 2816028280032. Its totient is φ = 1408014140012.

The previous prime is 2112021209939. The next prime is 2112021210037. The reversal of 2112021210021 is 1200121202112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2112021210021 - 2¹¹ = 2112021207973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112021210041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352003535001 + ... + 352003535006.

It is an arithmetic number, because the mean of its divisors is an integer number (704007070008).

Almost surely, 2^{2112021210021} is an apocalyptic number.

It is an amenable number.

2112021210021 is a deficient number, since it is larger than the sum of its proper divisors (704007070011).

2112021210021 is an equidigital number, since it uses as much as digits as its factorization.

2112021210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704007070010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2112021210021 its reverse (1200121202112), we get a palindrome (3312142412133).

The spelling of 2112021210021 in words is "two trillion, one hundred twelve billion, twenty-one million, two hundred ten thousand, twenty-one".