21013010113 has 8 divisors (see below), whose sum is σ = 21087630720. Its totient is φ = 20938517040.

The previous prime is 21013010099. The next prime is 21013010129. The reversal of 21013010113 is 31101031012.

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 21013010113 - 2³³ = 12423075521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21013010093 and 21013010102.

It is not an unprimeable number, because it can be changed into a prime (21013010143) 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, 304483 + ... + 367063.

It is an arithmetic number, because the mean of its divisors is an integer number (2635953840).

Almost surely, 2^21013010113 is an apocalyptic number.

It is an amenable number.

21013010113 is a deficient number, since it is larger than the sum of its proper divisors (74620607).

21013010113 is an equidigital number, since it uses as much as digits as its factorization.

21013010113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63767.

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

Adding to 21013010113 its reverse (31101031012), we get a palindrome (52114041125).

The spelling of 21013010113 in words is "twenty-one billion, thirteen million, ten thousand, one hundred thirteen".