21113012203 has 8 divisors (see below), whose sum is σ = 21574844928. Its totient is φ = 20656119144.

The previous prime is 21113012183. The next prime is 21113012233. The reversal of 21113012203 is 30221031112.

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 21113012203 - 2⁹ = 21113011691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113012233) 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, 1226275 + ... + 1243372.

It is an arithmetic number, because the mean of its divisors is an integer number (2696855616).

Almost surely, 2^21113012203 is an apocalyptic number.

21113012203 is a deficient number, since it is larger than the sum of its proper divisors (461832725).

21113012203 is a wasteful number, since it uses less digits than its factorization.

21113012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469833.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21113012203 its reverse (30221031112), we get a palindrome (51334043315).

The spelling of 21113012203 in words is "twenty-one billion, one hundred thirteen million, twelve thousand, two hundred three".