2797218461721 has 4 divisors (see below), whose sum is σ = 3729624615632. Its totient is φ = 1864812307812.

The previous prime is 2797218461707. The next prime is 2797218461731. The reversal of 2797218461721 is 1271648127972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2797218461721 - 2⁹ = 2797218461209 is a prime.

It is a super-2 number, since 2×2797218461721² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2797218461731) 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, 466203076951 + ... + 466203076956.

It is an arithmetic number, because the mean of its divisors is an integer number (932406153908).

Almost surely, 2^{2797218461721} is an apocalyptic number.

It is an amenable number.

2797218461721 is a deficient number, since it is larger than the sum of its proper divisors (932406153911).

2797218461721 is an equidigital number, since it uses as much as digits as its factorization.

2797218461721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932406153910.

The product of its digits is 4741632, while the sum is 57.

The spelling of 2797218461721 in words is "two trillion, seven hundred ninety-seven billion, two hundred eighteen million, four hundred sixty-one thousand, seven hundred twenty-one".