21100311321303 has 16 divisors (see below), whose sum is σ = 29110599705600. Its totient is φ = 13580614544640.

The previous prime is 21100311321293. The next prime is 21100311321371. The reversal of 21100311321303 is 30312311300112.

It is a happy number.

It is not a de Polignac number, because 21100311321303 - 2²¹ = 21100309224151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100311321303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100311321373) 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, 270706938 + ... + 270784871.

It is an arithmetic number, because the mean of its divisors is an integer number (1819412481600).

Almost surely, 2^{21100311321303} is an apocalyptic number.

21100311321303 is a deficient number, since it is larger than the sum of its proper divisors (8010288384297).

21100311321303 is a wasteful number, since it uses less digits than its factorization.

21100311321303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541492262.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21100311321303 its reverse (30312311300112), we get a palindrome (51412622621415).

The spelling of 21100311321303 in words is "twenty-one trillion, one hundred billion, three hundred eleven million, three hundred twenty-one thousand, three hundred three".