21203211113 has 8 divisors (see below), whose sum is σ = 24235280832. Its totient is φ = 18171901296.

The previous prime is 21203211109. The next prime is 21203211149. The reversal of 21203211113 is 31111230212.

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 21203211113 - 2² = 21203211109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21203211091 and 21203211100.

It is not an unprimeable number, because it can be changed into a prime (21203211163) 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, 128870 + ... + 242927.

It is an arithmetic number, because the mean of its divisors is an integer number (3029410104).

Almost surely, 2^21203211113 is an apocalyptic number.

It is an amenable number.

21203211113 is a deficient number, since it is larger than the sum of its proper divisors (3032069719).

21203211113 is an equidigital number, since it uses as much as digits as its factorization.

21203211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379951.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21203211113 its reverse (31111230212), we get a palindrome (52314441325).

The spelling of 21203211113 in words is "twenty-one billion, two hundred three million, two hundred eleven thousand, one hundred thirteen".