2830120721 has 8 divisors (see below), whose sum is σ = 2993625600. Its totient is φ = 2669987232.

The previous prime is 2830120703. The next prime is 2830120729. The reversal of 2830120721 is 1270210382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2830120721 - 2²⁶ = 2763011857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2830120729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841121 + ... + 844478.

It is an arithmetic number, because the mean of its divisors is an integer number (374203200).

Almost surely, 2^2830120721 is an apocalyptic number.

It is an amenable number.

2830120721 is a deficient number, since it is larger than the sum of its proper divisors (163504879).

2830120721 is a wasteful number, since it uses less digits than its factorization.

2830120721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685695.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2830120721 is about 53198.8789449552. The cubic root of 2830120721 is about 1414.4957720960.

The spelling of 2830120721 in words is "two billion, eight hundred thirty million, one hundred twenty thousand, seven hundred twenty-one".