21044100000 has 576 divisors, whose sum is σ = 86178484224. Its totient is φ = 4368000000.

The previous prime is 21044099963. The next prime is 21044100013. The reversal of 21044100000 is 144012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23099545 + ... + 23100455.

It is an arithmetic number, because the mean of its divisors is an integer number (149615424).

Almost surely, 2^21044100000 is an apocalyptic number.

21044100000 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 21044100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43089242112).

21044100000 is an abundant number, since it is smaller than the sum of its proper divisors (65134384224).

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

21044100000 is an equidigital number, since it uses as much as digits as its factorization.

21044100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21044100000 its reverse (144012), we get a palindrome (21044244012).

It can be divided in two parts, 210 and 44100000, that multiplied together give a cube (9261000000 = 2100³).

The spelling of 21044100000 in words is "twenty-one billion, forty-four million, one hundred thousand".