21041003011 has 4 divisors (see below), whose sum is σ = 24046860592. Its totient is φ = 18035145432.

The previous prime is 21041002987. The next prime is 21041003057. The reversal of 21041003011 is 11030014012.

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 21041003011 - 2⁵ = 21041002979 is a prime.

It is a super-2 number, since 2×21041003011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21041002982 and 21041003000.

It is not an unprimeable number, because it can be changed into a prime (21041003111) 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, 1502928780 + ... + 1502928793.

It is an arithmetic number, because the mean of its divisors is an integer number (6011715148).

Almost surely, 2^21041003011 is an apocalyptic number.

21041003011 is a deficient number, since it is larger than the sum of its proper divisors (3005857581).

21041003011 is an equidigital number, since it uses as much as digits as its factorization.

21041003011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005857580.

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

Adding to 21041003011 its reverse (11030014012), we get a palindrome (32071017023).

The spelling of 21041003011 in words is "twenty-one billion, forty-one million, three thousand, eleven".