2112211322021 has 2 divisors, whose sum is σ = 2112211322022. Its totient is φ = 2112211322020.

The previous prime is 2112211321981. The next prime is 2112211322029. The reversal of 2112211322021 is 1202231122112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1800322581121 + 311888740900 = 1341761^2 + 558470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112211322021 is a prime.

It is a super-2 number, since 2×2112211322021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112211321984 and 2112211322002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112211322029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056105661010 + 1056105661011.

It is an arithmetic number, because the mean of its divisors is an integer number (1056105661011).

Almost surely, 2^{2112211322021} is an apocalyptic number.

It is an amenable number.

2112211322021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112211322021 is an equidigital number, since it uses as much as digits as its factorization.

2112211322021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2112211322021 its reverse (1202231122112), we get a palindrome (3314442444133).

The spelling of 2112211322021 in words is "two trillion, one hundred twelve billion, two hundred eleven million, three hundred twenty-two thousand, twenty-one".