21433322001 has 128 divisors (see below), whose sum is σ = 39345868800. Its totient is φ = 10059033600.

The previous prime is 21433321997. The next prime is 21433322011. The reversal of 21433322001 is 10022333412.

It is not a de Polignac number, because 21433322001 - 2² = 21433321997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21433322011) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5563726 + ... + 5567576.

It is an arithmetic number, because the mean of its divisors is an integer number (307389600).

Almost surely, 2^21433322001 is an apocalyptic number.

21433322001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21433322001 is a deficient number, since it is larger than the sum of its proper divisors (17912546799).

21433322001 is a wasteful number, since it uses less digits than its factorization.

21433322001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21433322001 its reverse (10022333412), we get a palindrome (31455655413).

The spelling of 21433322001 in words is "twenty-one billion, four hundred thirty-three million, three hundred twenty-two thousand, one".