21112340432401 has 8 divisors (see below), whose sum is σ = 22178122430400. Its totient is φ = 20058879613872.

The previous prime is 21112340432399. The next prime is 21112340432509. The reversal of 21112340432401 is 10423404321112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21112340432401 - 2¹ = 21112340432399 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 21112340432401.

It is not an unprimeable number, because it can be changed into a prime (21112340432801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3080291355 + ... + 3080298208.

It is an arithmetic number, because the mean of its divisors is an integer number (2772265303800).

Almost surely, 2^{21112340432401} is an apocalyptic number.

It is an amenable number.

21112340432401 is a deficient number, since it is larger than the sum of its proper divisors (1065781997999).

21112340432401 is a wasteful number, since it uses less digits than its factorization.

21112340432401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160589735.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21112340432401 its reverse (10423404321112), we get a palindrome (31535744753513).

The spelling of 21112340432401 in words is "twenty-one trillion, one hundred twelve billion, three hundred forty million, four hundred thirty-two thousand, four hundred one".