20131101013 has 4 divisors (see below), whose sum is σ = 20825276940. Its totient is φ = 19436925088.

The previous prime is 20131100999. The next prime is 20131101019. The reversal of 20131101013 is 31010113102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11686042404 + 8445058609 = 108102^2 + 91897^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131101013 - 2²¹ = 20129003861 is a prime.

It is a super-2 number, since 2×20131101013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20131100984 and 20131101002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131101019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347087920 + ... + 347087977.

It is an arithmetic number, because the mean of its divisors is an integer number (5206319235).

Almost surely, 2^20131101013 is an apocalyptic number.

It is an amenable number.

20131101013 is a deficient number, since it is larger than the sum of its proper divisors (694175927).

20131101013 is an equidigital number, since it uses as much as digits as its factorization.

20131101013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694175926.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 20131101013 its reverse (31010113102), we get a palindrome (51141214115).

The spelling of 20131101013 in words is "twenty billion, one hundred thirty-one million, one hundred one thousand, thirteen".