21103230110100 has 144 divisors (see below), whose sum is σ = 62557003345536. Its totient is φ = 5491067904000.

The previous prime is 21103230110093. The next prime is 21103230110129. The reversal of 21103230110100 is 101103230112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21103230110100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3040921 + ... + 7173120.

It is an arithmetic number, because the mean of its divisors is an integer number (434423634344).

Almost surely, 2^{21103230110100} is an apocalyptic number.

21103230110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103230110100 is an abundant number, since it is smaller than the sum of its proper divisors (41453773235436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21103230110100 is a wasteful number, since it uses less digits than its factorization.

21103230110100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10214226 (or 10214219 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21103230110100 its reverse (101103230112), we get a palindrome (21204333340212).

The spelling of 21103230110100 in words is "twenty-one trillion, one hundred three billion, two hundred thirty million, one hundred ten thousand, one hundred".