21401010401 has 8 divisors (see below), whose sum is σ = 21612403584. Its totient is φ = 21189828240.

The previous prime is 21401010361. The next prime is 21401010403. The reversal of 21401010401 is 10401010412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21401010401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21401010403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155096 + ... + 258566.

It is an arithmetic number, because the mean of its divisors is an integer number (2701550448).

Almost surely, 2^21401010401 is an apocalyptic number.

It is an amenable number.

21401010401 is a deficient number, since it is larger than the sum of its proper divisors (211393183).

21401010401 is a wasteful number, since it uses less digits than its factorization.

21401010401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105511.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21401010401 its reverse (10401010412), we get a palindrome (31802020813).

The spelling of 21401010401 in words is "twenty-one billion, four hundred one million, ten thousand, four hundred one".