7007210021 has 4 divisors (see below), whose sum is σ = 8008240032. Its totient is φ = 6006180012.

The previous prime is 7007210003. The next prime is 7007210047. The reversal of 7007210021 is 1200127007.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1200127007 = 10529 ⋅113983.

It is a de Polignac number, because none of the positive numbers 2^k-7007210021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7007209975 and 7007210002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7007210071) 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, 500514995 + ... + 500515008.

It is an arithmetic number, because the mean of its divisors is an integer number (2002060008).

Almost surely, 2^7007210021 is an apocalyptic number.

It is an amenable number.

7007210021 is a deficient number, since it is larger than the sum of its proper divisors (1001030011).

7007210021 is a wasteful number, since it uses less digits than its factorization.

7007210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001030010.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 7007210021 is about 83709.0796807610. The cubic root of 7007210021 is about 1913.5877323603.

Adding to 7007210021 its reverse (1200127007), we get a palindrome (8207337028).

The spelling of 7007210021 in words is "seven billion, seven million, two hundred ten thousand, twenty-one".