21201313113 has 8 divisors (see below), whose sum is σ = 31409352800. Its totient is φ = 14134208724.

The previous prime is 21201313093. The next prime is 21201313121. The reversal of 21201313113 is 31131310212.

It is not a de Polignac number, because 21201313113 - 2¹³ = 21201304921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201313123) 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, 392616883 + ... + 392616936.

It is an arithmetic number, because the mean of its divisors is an integer number (3926169100).

Almost surely, 2^21201313113 is an apocalyptic number.

It is an amenable number.

21201313113 is a deficient number, since it is larger than the sum of its proper divisors (10208039687).

21201313113 is an equidigital number, since it uses as much as digits as its factorization.

21201313113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785233828 (or 785233822 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21201313113 its reverse (31131310212), we get a palindrome (52332623325).

The spelling of 21201313113 in words is "twenty-one billion, two hundred one million, three hundred thirteen thousand, one hundred thirteen".