21201013113 has 12 divisors (see below), whose sum is σ = 32883204240. Its totient is φ = 12114864552.

The previous prime is 21201013111. The next prime is 21201013129. The reversal of 21201013113 is 31131010212.

It is a happy number.

It is not a de Polignac number, because 21201013113 - 2¹ = 21201013111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201013092 and 21201013101.

It is not an unprimeable number, because it can be changed into a prime (21201013111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72112143 + ... + 72112436.

It is an arithmetic number, because the mean of its divisors is an integer number (2740267020).

Almost surely, 2^21201013113 is an apocalyptic number.

It is an amenable number.

21201013113 is a deficient number, since it is larger than the sum of its proper divisors (11682191127).

21201013113 is a wasteful number, since it uses less digits than its factorization.

21201013113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144224596 (or 144224589 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21201013113 its reverse (31131010212), we get a palindrome (52332023325).

The spelling of 21201013113 in words is "twenty-one billion, two hundred one million, thirteen thousand, one hundred thirteen".