2112222122021 has 8 divisors (see below), whose sum is σ = 2304287841504. Its totient is φ = 1920163990320.

The previous prime is 2112222122009. The next prime is 2112222122029. The reversal of 2112222122021 is 1202212222112.

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 2112222122021 - 2⁶ = 2112222121957 is a prime.

It is a super-2 number, since 2×2112222122021² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2112222121984 and 2112222122002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112222122029) 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 7 ways as a sum of consecutive naturals, for example, 1306910 + ... + 2435663.

It is an arithmetic number, because the mean of its divisors is an integer number (288035980188).

Almost surely, 2^{2112222122021} is an apocalyptic number.

It is an amenable number.

2112222122021 is a deficient number, since it is larger than the sum of its proper divisors (192065719483).

2112222122021 is a wasteful number, since it uses less digits than its factorization.

2112222122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793891.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2112222122021 its reverse (1202212222112), we get a palindrome (3314434344133).

The spelling of 2112222122021 in words is "two trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, twenty-one".