21011010033011 has 4 divisors (see below), whose sum is σ = 21041772859512. Its totient is φ = 20980247206512.

The previous prime is 21011010032989. The next prime is 21011010033017. The reversal of 21011010033011 is 11033001011012.

It is a happy number.

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 21011010033011 - 2¹⁰ = 21011010031987 is a prime.

It is a super-2 number, since 2×21011010033011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011010033017) 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, 15381412226 + ... + 15381413591.

It is an arithmetic number, because the mean of its divisors is an integer number (5260443214878).

Almost surely, 2^{21011010033011} is an apocalyptic number.

21011010033011 is a deficient number, since it is larger than the sum of its proper divisors (30762826501).

21011010033011 is an equidigital number, since it uses as much as digits as its factorization.

21011010033011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30762826500.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21011010033011 its reverse (11033001011012), we get a palindrome (32044011044023).

The spelling of 21011010033011 in words is "twenty-one trillion, eleven billion, ten million, thirty-three thousand, eleven".