1122112021 has 2 divisors, whose sum is σ = 1122112022. Its totient is φ = 1122112020.

The previous prime is 1122112007. The next prime is 1122112027. The reversal of 1122112021 is 1202112211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 927202500 + 194909521 = 30450^2 + 13961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122112021 - 2⁵ = 1122111989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1122111992 and 1122112010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122112027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561056010 + 561056011.

It is an arithmetic number, because the mean of its divisors is an integer number (561056011).

Almost surely, 2^1122112021 is an apocalyptic number.

It is an amenable number.

1122112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122112021 is an equidigital number, since it uses as much as digits as its factorization.

1122112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1122112021 is about 33497.9405486367. The cubic root of 1122112021 is about 1039.1511876561.

Adding to 1122112021 its reverse (1202112211), we get a palindrome (2324224232).

The spelling of 1122112021 in words is "one billion, one hundred twenty-two million, one hundred twelve thousand, twenty-one".