7100021 has 4 divisors (see below), whose sum is σ = 7109472. Its totient is φ = 7090572.

The previous prime is 7100017. The next prime is 7100029. The reversal of 7100021 is 1200017.

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 a cyclic number.

It is not a de Polignac number, because 7100021 - 2² = 7100017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7099975 and 7100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7100029) 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 3 ways as a sum of consecutive naturals, for example, 3491 + ... + 5136.

It is an arithmetic number, because the mean of its divisors is an integer number (1777368).

Almost surely, 2^7100021 is an apocalyptic number.

It is an amenable number.

7100021 is a deficient number, since it is larger than the sum of its proper divisors (9451).

7100021 is an equidigital number, since it uses as much as digits as its factorization.

7100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9450.

The product of its (nonzero) digits is 14, while the sum is 11.

The square root of 7100021 is about 2664.5864594717. The cubic root of 7100021 is about 192.1999237700.

Adding to 7100021 its reverse (1200017), we get a palindrome (8300038).

The spelling of 7100021 in words is "seven million, one hundred thousand, twenty-one".