260021011 has 4 divisors (see below), whose sum is σ = 260472232. Its totient is φ = 259569792.

The previous prime is 260020993. The next prime is 260021033. The reversal of 260021011 is 110120062.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 260021011 - 2⁷ = 260020883 is a prime.

It is a super-2 number, since 2×260021011² = 135221852322924242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 260020982 and 260021000.

It is not an unprimeable number, because it can be changed into a prime (260021071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224745 + ... + 225898.

It is an arithmetic number, because the mean of its divisors is an integer number (65118058).

Almost surely, 2^260021011 is an apocalyptic number.

260021011 is a deficient number, since it is larger than the sum of its proper divisors (451221).

260021011 is an equidigital number, since it uses as much as digits as its factorization.

260021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451220.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 260021011 is about 16125.1670068871. The cubic root of 260021011 is about 638.2676220893.

Adding to 260021011 its reverse (110120062), we get a palindrome (370141073).

The spelling of 260021011 in words is "two hundred sixty million, twenty-one thousand, eleven".