6985392724221 has 4 divisors (see below), whose sum is σ = 9313856965632. Its totient is φ = 4656928482812.

The previous prime is 6985392724201. The next prime is 6985392724229. The reversal of 6985392724221 is 1224272935896.

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 6985392724221 - 2²¹ = 6985390627069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6985392724229) 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, 1164232120701 + ... + 1164232120706.

It is an arithmetic number, because the mean of its divisors is an integer number (2328464241408).

Almost surely, 2^{6985392724221} is an apocalyptic number.

It is an amenable number.

6985392724221 is a deficient number, since it is larger than the sum of its proper divisors (2328464241411).

6985392724221 is a wasteful number, since it uses less digits than its factorization.

6985392724221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328464241410.

The product of its digits is 26127360, while the sum is 60.

The spelling of 6985392724221 in words is "six trillion, nine hundred eighty-five billion, three hundred ninety-two million, seven hundred twenty-four thousand, two hundred twenty-one".