2162120449 has 2 divisors, whose sum is σ = 2162120450. Its totient is φ = 2162120448.

The previous prime is 2162120407. The next prime is 2162120459. The reversal of 2162120449 is 9440212612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2131484224 + 30636225 = 46168^2 + 5535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2162120449 - 2⁷ = 2162120321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2162120449.

It is not a weakly prime, because it can be changed into another prime (2162120459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081060224 + 1081060225.

It is an arithmetic number, because the mean of its divisors is an integer number (1081060225).

Almost surely, 2^2162120449 is an apocalyptic number.

It is an amenable number.

2162120449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2162120449 is an equidigital number, since it uses as much as digits as its factorization.

2162120449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 2162120449 is about 46498.6069576283. The cubic root of 2162120449 is about 1293.0836727962.

The spelling of 2162120449 in words is "two billion, one hundred sixty-two million, one hundred twenty thousand, four hundred forty-nine".