21311004041 has 8 divisors (see below), whose sum is σ = 22566690720. Its totient is φ = 20055550528.

The previous prime is 21311004031. The next prime is 21311004047. The reversal of 21311004041 is 14040011312.

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 21311004041 - 2²² = 21306809737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21311004047) 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, 151490 + ... + 256068.

It is an arithmetic number, because the mean of its divisors is an integer number (2820836340).

Almost surely, 2^21311004041 is an apocalyptic number.

It is an amenable number.

21311004041 is a deficient number, since it is larger than the sum of its proper divisors (1255686679).

21311004041 is a wasteful number, since it uses less digits than its factorization.

21311004041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116583.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21311004041 its reverse (14040011312), we get a palindrome (35351015353).

The spelling of 21311004041 in words is "twenty-one billion, three hundred eleven million, four thousand, forty-one".