21100403143100 has 36 divisors (see below), whose sum is σ = 46904652264288. Its totient is φ = 8234303664000.

The previous prime is 21100403143069. The next prime is 21100403143159. The reversal of 21100403143100 is 134130400112.

It is a super-2 number, since 2×21100403143100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2573215796 + ... + 2573223995.

Almost surely, 2^{21100403143100} is an apocalyptic number.

21100403143100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100403143100 is an abundant number, since it is smaller than the sum of its proper divisors (25804249121188).

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

21100403143100 is a wasteful number, since it uses less digits than its factorization.

21100403143100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146439846 (or 5146439839 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21100403143100 its reverse (134130400112), we get a palindrome (21234533543212).

The spelling of 21100403143100 in words is "twenty-one trillion, one hundred billion, four hundred three million, one hundred forty-three thousand, one hundred".