21100223210324 has 12 divisors (see below), whose sum is σ = 37058695279284. Its totient is φ = 10512024559104.

The previous prime is 21100223210323. The next prime is 21100223210383. The reversal of 21100223210324 is 42301232200112.

It can be written as a sum of positive squares in 2 ways, for example, as 1932183400900 + 19168039809424 = 1390030^2 + 4378132^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21100223210324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100223210323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9521760269 + ... + 9521762484.

It is an arithmetic number, because the mean of its divisors is an integer number (3088224606607).

Almost surely, 2^{21100223210324} is an apocalyptic number.

It is an amenable number.

21100223210324 is a deficient number, since it is larger than the sum of its proper divisors (15958472068960).

21100223210324 is a wasteful number, since it uses less digits than its factorization.

21100223210324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19043523034 (or 19043523032 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21100223210324 its reverse (42301232200112), we get a palindrome (63401455410436).

The spelling of 21100223210324 in words is "twenty-one trillion, one hundred billion, two hundred twenty-three million, two hundred ten thousand, three hundred twenty-four".