2102700721 has 8 divisors (see below), whose sum is σ = 2414584800. Its totient is φ = 1810938240.

The previous prime is 2102700701. The next prime is 2102700737. The reversal of 2102700721 is 1270072012.

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 2102700721 - 2¹¹ = 2102698673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102700692 and 2102700701.

It is not an unprimeable number, because it can be changed into a prime (2102700701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5030176 + ... + 5030593.

It is an arithmetic number, because the mean of its divisors is an integer number (301823100).

Almost surely, 2^2102700721 is an apocalyptic number.

It is an amenable number.

2102700721 is a deficient number, since it is larger than the sum of its proper divisors (311884079).

2102700721 is a wasteful number, since it uses less digits than its factorization.

2102700721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060799.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 2102700721 is about 45855.2147634269. The cubic root of 2102700721 is about 1281.1278960187.

Adding to 2102700721 its reverse (1270072012), we get a palindrome (3372772733).

The spelling of 2102700721 in words is "two billion, one hundred two million, seven hundred thousand, seven hundred twenty-one".