2112121849 has 2 divisors, whose sum is σ = 2112121850. Its totient is φ = 2112121848.

The previous prime is 2112121813. The next prime is 2112121867. The reversal of 2112121849 is 9481212112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1233414400 + 878707449 = 35120^2 + 29643^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112121849 - 2¹⁵ = 2112089081 is a prime.

It is a super-2 number, since 2×2112121849² = 8922117410046357602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2112121849.

It is not a weakly prime, because it can be changed into another prime (2112121049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056060924 + 1056060925.

It is an arithmetic number, because the mean of its divisors is an integer number (1056060925).

Almost surely, 2^2112121849 is an apocalyptic number.

It is an amenable number.

2112121849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112121849 is an equidigital number, since it uses as much as digits as its factorization.

2112121849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 31.

The square root of 2112121849 is about 45957.8268524525. The cubic root of 2112121849 is about 1283.0384054412.

The spelling of 2112121849 in words is "two billion, one hundred twelve million, one hundred twenty-one thousand, eight hundred forty-nine".