112121021209 has 2 divisors, whose sum is σ = 112121021210. Its totient is φ = 112121021208.

The previous prime is 112121021197. The next prime is 112121021263. The reversal of 112121021209 is 902120121211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79746936025 + 32374085184 = 282395^2 + 179928^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121021209 - 2¹¹ = 112121019161 is a prime.

It is a super-2 number, since 2×112121021209² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 112121021209.

It is not a weakly prime, because it can be changed into another prime (112121021609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56060510604 + 56060510605.

It is an arithmetic number, because the mean of its divisors is an integer number (56060510605).

Almost surely, 2^112121021209 is an apocalyptic number.

It is an amenable number.

112121021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

112121021209 is an equidigital number, since it uses as much as digits as its factorization.

112121021209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 112121021209 in words is "one hundred twelve billion, one hundred twenty-one million, twenty-one thousand, two hundred nine".