21033220340001 has 12 divisors (see below), whose sum is σ = 28653676367792. Its totient is φ = 13723803338088.

The previous prime is 21033220339991. The next prime is 21033220340009. The reversal of 21033220340001 is 10004302233012.

It is not a de Polignac number, because 21033220340001 - 2³⁸ = 20758342433057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21033220340001.

It is not an unprimeable number, because it can be changed into a prime (21033220340009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1586927155 + ... + 1586940408.

Almost surely, 2^{21033220340001} is an apocalyptic number.

It is an amenable number.

21033220340001 is a deficient number, since it is larger than the sum of its proper divisors (7620456027791).

21033220340001 is an equidigital number, since it uses as much as digits as its factorization.

21033220340001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173867660 (or 3173867613 counting only the distinct ones).

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

Adding to 21033220340001 its reverse (10004302233012), we get a palindrome (31037522573013).

The spelling of 21033220340001 in words is "twenty-one trillion, thirty-three billion, two hundred twenty million, three hundred forty thousand, one".