21333105051 has 8 divisors (see below), whose sum is σ = 28868679744. Its totient is φ = 14009800200.

The previous prime is 21333105037. The next prime is 21333105097. The reversal of 21333105051 is 15050133312.

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

It is not a de Polignac number, because 21333105051 - 2¹⁰ = 21333104027 is a prime.

It is a super-2 number, since 2×21333105051² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21333105011) 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, 53067225 + ... + 53067626.

It is an arithmetic number, because the mean of its divisors is an integer number (3608584968).

Almost surely, 2^21333105051 is an apocalyptic number.

21333105051 is a deficient number, since it is larger than the sum of its proper divisors (7535574693).

21333105051 is a wasteful number, since it uses less digits than its factorization.

21333105051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106134921.

The product of its (nonzero) digits is 1350, while the sum is 24.

Adding to 21333105051 its reverse (15050133312), we get a palindrome (36383238363).

The spelling of 21333105051 in words is "twenty-one billion, three hundred thirty-three million, one hundred five thousand, fifty-one".