2121920497 has 2 divisors, whose sum is σ = 2121920498. Its totient is φ = 2121920496.

The previous prime is 2121920461. The next prime is 2121920533. The reversal of 2121920497 is 7940291212.

It is a balanced prime because it is at equal distance from previous prime (2121920461) and next prime (2121920533).

It can be written as a sum of positive squares in only one way, i.e., 1956823696 + 165096801 = 44236^2 + 12849^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121920497 - 2⁷ = 2121920369 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121920417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060960248 + 1060960249.

It is an arithmetic number, because the mean of its divisors is an integer number (1060960249).

Almost surely, 2^2121920497 is an apocalyptic number.

It is an amenable number.

2121920497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121920497 is an equidigital number, since it uses as much as digits as its factorization.

2121920497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 2121920497 is about 46064.3082765822. The cubic root of 2121920497 is about 1285.0194543528.

The spelling of 2121920497 in words is "two billion, one hundred twenty-one million, nine hundred twenty thousand, four hundred ninety-seven".