2097218148481 has 4 divisors (see below), whose sum is σ = 2169536015700. Its totient is φ = 2024900281264.

The previous prime is 2097218148449. The next prime is 2097218148499. The reversal of 2097218148481 is 1848418127902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1264817378881 + 832400769600 = 1124641^2 + 912360^2 .

It is a cyclic number.

It is not a de Polignac number, because 2097218148481 - 2⁵ = 2097218148449 is a prime.

It is a super-2 number, since 2×2097218148481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2097218148281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36158933566 + ... + 36158933623.

It is an arithmetic number, because the mean of its divisors is an integer number (542384003925).

Almost surely, 2^{2097218148481} is an apocalyptic number.

It is an amenable number.

2097218148481 is a deficient number, since it is larger than the sum of its proper divisors (72317867219).

2097218148481 is an equidigital number, since it uses as much as digits as its factorization.

2097218148481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72317867218.

The product of its (nonzero) digits is 2064384, while the sum is 55.

The spelling of 2097218148481 in words is "two trillion, ninety-seven billion, two hundred eighteen million, one hundred forty-eight thousand, four hundred eighty-one".