21133051 has 8 divisors (see below), whose sum is σ = 21401424. Its totient is φ = 20866560.

The previous prime is 21133027. The next prime is 21133087. The reversal of 21133051 is 15033112.

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

It is a cyclic number.

It is not a de Polignac number, because 21133051 - 2¹⁷ = 21001979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133451) 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, 46015 + ... + 46471.

It is an arithmetic number, because the mean of its divisors is an integer number (2675178).

Almost surely, 2^21133051 is an apocalyptic number.

21133051 is a deficient number, since it is larger than the sum of its proper divisors (268373).

21133051 is a wasteful number, since it uses less digits than its factorization.

21133051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 21133051 is about 4597.0698276185. The cubic root of 21133051 is about 276.4738543033.

Adding to 21133051 its reverse (15033112), we get a palindrome (36166163).

The spelling of 21133051 in words is "twenty-one million, one hundred thirty-three thousand, fifty-one".