112121222111021 has 2 divisors, whose sum is σ = 112121222111022. Its totient is φ = 112121222111020.

The previous prime is 112121222110991. The next prime is 112121222111053. The reversal of 112121222111021 is 120111222121211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84393362335396 + 27727859775625 = 9186586^2 + 5265725^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121222111021 - 2¹⁰ = 112121222109997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 112121222110984 and 112121222111002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112121222011021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56060611055510 + 56060611055511.

It is an arithmetic number, because the mean of its divisors is an integer number (56060611055511).

Almost surely, 2^{112121222111021} is an apocalyptic number.

It is an amenable number.

112121222111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

112121222111021 is an equidigital number, since it uses as much as digits as its factorization.

112121222111021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 112121222111021 its reverse (120111222121211), we get a palindrome (232232444232232).

The spelling of 112121222111021 in words is "one hundred twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, twenty-one".