21201440313 has 8 divisors (see below), whose sum is σ = 28312553248. Its totient is φ = 14112310464.

The previous prime is 21201440311. The next prime is 21201440327. The reversal of 21201440313 is 31304410212.

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

It is not a de Polignac number, because 21201440313 - 2¹ = 21201440311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21201440313.

It is not an unprimeable number, because it can be changed into a prime (21201440311) 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, 5493520 + ... + 5497377.

It is an arithmetic number, because the mean of its divisors is an integer number (3539069156).

Almost surely, 2^21201440313 is an apocalyptic number.

It is an amenable number.

21201440313 is a deficient number, since it is larger than the sum of its proper divisors (7111112935).

21201440313 is a wasteful number, since it uses less digits than its factorization.

21201440313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10991543.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21201440313 its reverse (31304410212), we get a palindrome (52505850525).

The spelling of 21201440313 in words is "twenty-one billion, two hundred one million, four hundred forty thousand, three hundred thirteen".