21101433 has 16 divisors (see below), whose sum is σ = 29574336. Its totient is φ = 13366080.

The previous prime is 21101411. The next prime is 21101441. The reversal of 21101433 is 33410112.

It is not a de Polignac number, because 21101433 - 2⁵ = 21101401 is a prime.

It is a super-3 number, since 3×21101433³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2563 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (1848396).

Almost surely, 2^21101433 is an apocalyptic number.

It is an amenable number.

21101433 is a deficient number, since it is larger than the sum of its proper divisors (8472903).

21101433 is a wasteful number, since it uses less digits than its factorization.

21101433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504.

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

The square root of 21101433 is about 4593.6296106674. The cubic root of 21101433 is about 276.3359042982.

Adding to 21101433 its reverse (33410112), we get a palindrome (54511545).

The spelling of 21101433 in words is "twenty-one million, one hundred one thousand, four hundred thirty-three".