2146799021 has 2 divisors, whose sum is σ = 2146799022. Its totient is φ = 2146799020.

The previous prime is 2146798943. The next prime is 2146799041. The reversal of 2146799021 is 1209976412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1629736900 + 517062121 = 40370^2 + 22739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146799021 - 2¹⁴ = 2146782637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2146799021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2146799041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073399510 + 1073399511.

It is an arithmetic number, because the mean of its divisors is an integer number (1073399511).

Almost surely, 2^2146799021 is an apocalyptic number.

It is an amenable number.

2146799021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2146799021 is an equidigital number, since it uses as much as digits as its factorization.

2146799021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 2146799021 is about 46333.5625761715. The cubic root of 2146799021 is about 1290.0220377622.

The spelling of 2146799021 in words is "two billion, one hundred forty-six million, seven hundred ninety-nine thousand, twenty-one".