21403442220001 has 16 divisors (see below), whose sum is σ = 21585286176768. Its totient is φ = 21222369557200.

The previous prime is 21403442219953. The next prime is 21403442220007. The reversal of 21403442220001 is 10002224430412.

It is a cyclic number.

It is not a de Polignac number, because 21403442220001 - 2¹¹ = 21403442217953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21403442220007) 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, 188368716 + ... + 188482306.

It is an arithmetic number, because the mean of its divisors is an integer number (1349080386048).

Almost surely, 2^{21403442220001} is an apocalyptic number.

It is an amenable number.

21403442220001 is a deficient number, since it is larger than the sum of its proper divisors (181843956767).

21403442220001 is a wasteful number, since it uses less digits than its factorization.

21403442220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116972.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21403442220001 its reverse (10002224430412), we get a palindrome (31405666650413).

The spelling of 21403442220001 in words is "twenty-one trillion, four hundred three billion, four hundred forty-two million, two hundred twenty thousand, one".