21403101000 has 256 divisors, whose sum is σ = 70530969600. Its totient is φ = 5388768000.

The previous prime is 21403100987. The next prime is 21403101001. The reversal of 21403101000 is 10130412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21403101001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26390595 + ... + 26391405.

It is an arithmetic number, because the mean of its divisors is an integer number (275511600).

Almost surely, 2^21403101000 is an apocalyptic number.

21403101000 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 21403101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35265484800).

21403101000 is an abundant number, since it is smaller than the sum of its proper divisors (49127868600).

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

21403101000 is a wasteful number, since it uses less digits than its factorization.

21403101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1303 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21403101000 its reverse (10130412), we get a palindrome (21413231412).

The spelling of 21403101000 in words is "twenty-one billion, four hundred three million, one hundred one thousand".