21211022433 has 8 divisors (see below), whose sum is σ = 28323388768. Its totient is φ = 14119668864.

The previous prime is 21211022431. The next prime is 21211022543. The reversal of 21211022433 is 33422011212.

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

It is not a de Polignac number, because 21211022433 - 2¹ = 21211022431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211022431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5250835 + ... + 5254872.

It is an arithmetic number, because the mean of its divisors is an integer number (3540423596).

Almost surely, 2^21211022433 is an apocalyptic number.

It is an amenable number.

21211022433 is a deficient number, since it is larger than the sum of its proper divisors (7112366335).

21211022433 is a wasteful number, since it uses less digits than its factorization.

21211022433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506383.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21211022433 its reverse (33422011212), we get a palindrome (54633033645).

The spelling of 21211022433 in words is "twenty-one billion, two hundred eleven million, twenty-two thousand, four hundred thirty-three".