21011022033 has 8 divisors (see below), whose sum is σ = 28051512096. Its totient is φ = 13988940000.

The previous prime is 21011021989. The next prime is 21011022083. The reversal of 21011022033 is 33022011012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21011022033 - 2¹⁷ = 21010890961 is a prime.

It is a super-2 number, since 2×21011022033² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21011022083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4599343 + ... + 4603908.

It is an arithmetic number, because the mean of its divisors is an integer number (3506439012).

Almost surely, 2^21011022033 is an apocalyptic number.

It is an amenable number.

21011022033 is a deficient number, since it is larger than the sum of its proper divisors (7040490063).

21011022033 is an equidigital number, since it uses as much as digits as its factorization.

21011022033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9204015.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21011022033 its reverse (33022011012), we get a palindrome (54033033045).

The spelling of 21011022033 in words is "twenty-one billion, eleven million, twenty-two thousand, thirty-three".