2126521499 has 2 divisors, whose sum is σ = 2126521500. Its totient is φ = 2126521498.

The previous prime is 2126521493. The next prime is 2126521547. The reversal of 2126521499 is 9941256212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2126521499 - 2²⁴ = 2109744283 is a prime.

It is a super-3 number, since 3×2126521499³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2126521493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063260749 + 1063260750.

It is an arithmetic number, because the mean of its divisors is an integer number (1063260750).

Almost surely, 2^2126521499 is an apocalyptic number.

2126521499 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126521499 is an equidigital number, since it uses as much as digits as its factorization.

2126521499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 2126521499 is about 46114.2223072232. Note that the first 3 decimals coincide. The cubic root of 2126521499 is about 1285.9475615274.

The spelling of 2126521499 in words is "two billion, one hundred twenty-six million, five hundred twenty-one thousand, four hundred ninety-nine".