21401031241 has 8 divisors (see below), whose sum is σ = 21605692680. Its totient is φ = 21196637952.

The previous prime is 21401031229. The next prime is 21401031251. The reversal of 21401031241 is 14213010412.

It can be written as a sum of positive squares in 4 ways, for example, as 439782841 + 20961248400 = 20971^2 + 144780^2 .

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 21401031241 - 2⁵ = 21401031209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21401031251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95211 + ... + 227743.

It is an arithmetic number, because the mean of its divisors is an integer number (2700711585).

Almost surely, 2^21401031241 is an apocalyptic number.

It is an amenable number.

21401031241 is a deficient number, since it is larger than the sum of its proper divisors (204661439).

21401031241 is a wasteful number, since it uses less digits than its factorization.

21401031241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134075.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21401031241 its reverse (14213010412), we get a palindrome (35614041653).

The spelling of 21401031241 in words is "twenty-one billion, four hundred one million, thirty-one thousand, two hundred forty-one".