21102311101304 has 8 divisors (see below), whose sum is σ = 39566833314960. Its totient is φ = 10551155550648.

The previous prime is 21102311101303. The next prime is 21102311101423. The reversal of 21102311101304 is 40310111320112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102311101301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318894443824 + ... + 1318894443839.

It is an arithmetic number, because the mean of its divisors is an integer number (4945854164370).

Almost surely, 2^{21102311101304} is an apocalyptic number.

It is an amenable number.

21102311101304 is a deficient number, since it is larger than the sum of its proper divisors (18464522213656).

21102311101304 is a wasteful number, since it uses less digits than its factorization.

21102311101304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637788887669 (or 2637788887665 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21102311101304 its reverse (40310111320112), we get a palindrome (61412422421416).

The spelling of 21102311101304 in words is "twenty-one trillion, one hundred two billion, three hundred eleven million, one hundred one thousand, three hundred four".