21403002331100 has 432 divisors, whose sum is σ = 54183304546560. Its totient is φ = 7289597030400.

The previous prime is 21403002331093. The next prime is 21403002331127. The reversal of 21403002331100 is 113320030412.

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 polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14873524181 + ... + 14873525619.

It is an arithmetic number, because the mean of its divisors is an integer number (125424316080).

Almost surely, 2^{21403002331100} is an apocalyptic number.

21403002331100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21403002331100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27091652273280).

21403002331100 is an abundant number, since it is smaller than the sum of its proper divisors (32780302215460).

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

21403002331100 is a wasteful number, since it uses less digits than its factorization.

21403002331100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2292 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21403002331100 its reverse (113320030412), we get a palindrome (21516322361512).

The spelling of 21403002331100 in words is "twenty-one trillion, four hundred three billion, two million, three hundred thirty-one thousand, one hundred".