21311420241 has 8 divisors (see below), whose sum is σ = 28415933920. Its totient is φ = 14207260032.

The previous prime is 21311420213. The next prime is 21311420287. The reversal of 21311420241 is 14202411312.

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

It is not a de Polignac number, because 21311420241 - 2¹³ = 21311412049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21311420041) 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, 128001 + ... + 242913.

It is an arithmetic number, because the mean of its divisors is an integer number (3551991740).

Almost surely, 2^21311420241 is an apocalyptic number.

It is an amenable number.

21311420241 is a deficient number, since it is larger than the sum of its proper divisors (7104513679).

21311420241 is a wasteful number, since it uses less digits than its factorization.

21311420241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176735.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21311420241 its reverse (14202411312), we get a palindrome (35513831553).

The spelling of 21311420241 in words is "twenty-one billion, three hundred eleven million, four hundred twenty thousand, two hundred forty-one".