21140320431401 has 8 divisors (see below), whose sum is σ = 21275157830280. Its totient is φ = 21005485383168.

The previous prime is 21140320431389. The next prime is 21140320431427. The reversal of 21140320431401 is 10413402304112.

It can be written as a sum of positive squares in 4 ways, for example, as 323220675625 + 20817099755776 = 568525^2 + 4562576^2 .

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 21140320431401 - 2¹⁴ = 21140320415017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140320431431) 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, 19677785 + ... + 20724281.

It is an arithmetic number, because the mean of its divisors is an integer number (2659394728785).

Almost surely, 2^{21140320431401} is an apocalyptic number.

It is an amenable number.

21140320431401 is a deficient number, since it is larger than the sum of its proper divisors (134837398879).

21140320431401 is a wasteful number, since it uses less digits than its factorization.

21140320431401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175323.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21140320431401 its reverse (10413402304112), we get a palindrome (31553722735513).

The spelling of 21140320431401 in words is "twenty-one trillion, one hundred forty billion, three hundred twenty million, four hundred thirty-one thousand, four hundred one".