21213213100113 has 16 divisors (see below), whose sum is σ = 28309543009280. Its totient is φ = 14129517902544.

The previous prime is 21213213100109. The next prime is 21213213100139. The reversal of 21213213100113 is 31100131231212.

It is not a de Polignac number, because 21213213100113 - 2² = 21213213100109 is a prime.

It is a super-2 number, since 2×21213213100113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21213213100113.

It is not an unprimeable number, because it can be changed into a prime (21213213100153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15491820 + ... + 16805442.

It is an arithmetic number, because the mean of its divisors is an integer number (1769346438080).

Almost surely, 2^{21213213100113} is an apocalyptic number.

It is an amenable number.

21213213100113 is a deficient number, since it is larger than the sum of its proper divisors (7096329909167).

21213213100113 is a wasteful number, since it uses less digits than its factorization.

21213213100113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318428.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21213213100113 its reverse (31100131231212), we get a palindrome (52313344331325).

The spelling of 21213213100113 in words is "twenty-one trillion, two hundred thirteen billion, two hundred thirteen million, one hundred thousand, one hundred thirteen".