21032003011 has 4 divisors (see below), whose sum is σ = 21033442800. Its totient is φ = 21030563224.

The previous prime is 21032002997. The next prime is 21032003017. The reversal of 21032003011 is 11030023012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21032003011 is a prime.

It is a super-2 number, since 2×21032003011² (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 = 21032002982 and 21032003000.

It is not an unprimeable number, because it can be changed into a prime (21032003017) 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, 697756 + ... + 727273.

It is an arithmetic number, because the mean of its divisors is an integer number (5258360700).

Almost surely, 2^21032003011 is an apocalyptic number.

21032003011 is a deficient number, since it is larger than the sum of its proper divisors (1439789).

21032003011 is a wasteful number, since it uses less digits than its factorization.

21032003011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439788.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21032003011 its reverse (11030023012), we get a palindrome (32062026023).

The spelling of 21032003011 in words is "twenty-one billion, thirty-two million, three thousand, eleven".