2212112210021 has 4 divisors (see below), whose sum is σ = 2528128240032. Its totient is φ = 1896096180012.

The previous prime is 2212112210017. The next prime is 2212112210039. The reversal of 2212112210021 is 1200122112122.

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 2212112210021 - 2² = 2212112210017 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 (2212112210081) 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, 158008014995 + ... + 158008015008.

It is an arithmetic number, because the mean of its divisors is an integer number (632032060008).

Almost surely, 2^{2212112210021} is an apocalyptic number.

It is an amenable number.

2212112210021 is a deficient number, since it is larger than the sum of its proper divisors (316016030011).

2212112210021 is an equidigital number, since it uses as much as digits as its factorization.

2212112210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316016030010.

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

Adding to 2212112210021 its reverse (1200122112122), we get a palindrome (3412234322143).

The spelling of 2212112210021 in words is "two trillion, two hundred twelve billion, one hundred twelve million, two hundred ten thousand, twenty-one".