2148719620321 has 4 divisors (see below), whose sum is σ = 2149105461700. Its totient is φ = 2148333778944.

The previous prime is 2148719620303. The next prime is 2148719620339. The reversal of 2148719620321 is 1230269178412.

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

It is an interprime number because it is at equal distance from previous prime (2148719620303) and next prime (2148719620339).

It can be written as a sum of positive squares in 2 ways, for example, as 515208128400 + 1633511491921 = 717780^2 + 1278089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2148719620321 - 2⁷ = 2148719620193 is a prime.

It is a super-2 number, since 2×2148719620321² (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 (2148719626321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192912336 + ... + 192923473.

It is an arithmetic number, because the mean of its divisors is an integer number (537276365425).

Almost surely, 2^{2148719620321} is an apocalyptic number.

It is an amenable number.

2148719620321 is a deficient number, since it is larger than the sum of its proper divisors (385841379).

2148719620321 is an equidigital number, since it uses as much as digits as its factorization.

2148719620321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385841378.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 2148719620321 in words is "two trillion, one hundred forty-eight billion, seven hundred nineteen million, six hundred twenty thousand, three hundred twenty-one".