21401241121 has 8 divisors (see below), whose sum is σ = 23057244224. Its totient is φ = 19746631440.

The previous prime is 21401241091. The next prime is 21401241133. The reversal of 21401241121 is 12114210412.

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 21401241121 - 2¹⁹ = 21400716833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21401241161) 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, 316341 + ... + 377986.

It is an arithmetic number, because the mean of its divisors is an integer number (2882155528).

Almost surely, 2^21401241121 is an apocalyptic number.

It is an amenable number.

21401241121 is a deficient number, since it is larger than the sum of its proper divisors (1656003103).

21401241121 is a wasteful number, since it uses less digits than its factorization.

21401241121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696711.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21401241121 its reverse (12114210412), we get a palindrome (33515451533).

The spelling of 21401241121 in words is "twenty-one billion, four hundred one million, two hundred forty-one thousand, one hundred twenty-one".