21433411221 has 8 divisors (see below), whose sum is σ = 28612608960. Its totient is φ = 14271577152.

The previous prime is 21433411211. The next prime is 21433411243. The reversal of 21433411221 is 12211433412.

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

It is not a de Polignac number, because 21433411221 - 2⁶ = 21433411157 is a prime.

It is a super-2 number, since 2×21433411221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21433411191 and 21433411200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433411211) 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, 4338036 + ... + 4342973.

It is an arithmetic number, because the mean of its divisors is an integer number (3576576120).

Almost surely, 2^21433411221 is an apocalyptic number.

It is an amenable number.

21433411221 is a deficient number, since it is larger than the sum of its proper divisors (7179197739).

21433411221 is an equidigital number, since it uses as much as digits as its factorization.

21433411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8681835.

The product of its digits is 1152, while the sum is 24.

Adding to 21433411221 its reverse (12211433412), we get a palindrome (33644844633).

The spelling of 21433411221 in words is "twenty-one billion, four hundred thirty-three million, four hundred eleven thousand, two hundred twenty-one".