21001116413 has 8 divisors (see below), whose sum is σ = 22258932480. Its totient is φ = 19745795520.

The previous prime is 21001116407. The next prime is 21001116419. The reversal of 21001116413 is 31461110012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21001116407) and next prime (21001116419).

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 21001116413 - 2⁶ = 21001116349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001116419) 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, 606443 + ... + 640136.

It is an arithmetic number, because the mean of its divisors is an integer number (2782366560).

Almost surely, 2^21001116413 is an apocalyptic number.

It is an amenable number.

21001116413 is a deficient number, since it is larger than the sum of its proper divisors (1257816067).

21001116413 is a wasteful number, since it uses less digits than its factorization.

21001116413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247587.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21001116413 its reverse (31461110012), we get a palindrome (52462226425).

The spelling of 21001116413 in words is "twenty-one billion, one million, one hundred sixteen thousand, four hundred thirteen".