680021011 has 2 divisors, whose sum is σ = 680021012. Its totient is φ = 680021010.

The previous prime is 680021003. The next prime is 680021057. The reversal of 680021011 is 110120086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680021011 - 2³ = 680021003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 680021011.

It is not a weakly prime, because it can be changed into another prime (680021711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340010505 + 340010506.

It is an arithmetic number, because the mean of its divisors is an integer number (340010506).

Almost surely, 2^680021011 is an apocalyptic number.

680021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

680021011 is an equidigital number, since it uses as much as digits as its factorization.

680021011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 680021011 is about 26077.2124852332. The cubic root of 680021011 is about 879.3749913764.

Adding to 680021011 its reverse (110120086), we get a palindrome (790141097).

The spelling of 680021011 in words is "six hundred eighty million, twenty-one thousand, eleven".