21401401440101 has 16 divisors (see below), whose sum is σ = 23511249302400. Its totient is φ = 19390198595328.

The previous prime is 21401401440079. The next prime is 21401401440113. The reversal of 21401401440101 is 10104410410412.

It is a cyclic number.

It is not a de Polignac number, because 21401401440101 - 2³⁴ = 21384221570917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401401440401) 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, 1575416 + ... + 6729393.

It is an arithmetic number, because the mean of its divisors is an integer number (1469453081400).

Almost surely, 2^{21401401440101} is an apocalyptic number.

It is an amenable number.

21401401440101 is a deficient number, since it is larger than the sum of its proper divisors (2109847862299).

21401401440101 is a wasteful number, since it uses less digits than its factorization.

21401401440101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310748.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 21401401440101 its reverse (10104410410412), we get a palindrome (31505811850513).

The spelling of 21401401440101 in words is "twenty-one trillion, four hundred one billion, four hundred one million, four hundred forty thousand, one hundred one".