21021211130000 has 100 divisors (see below), whose sum is σ = 50908452268080. Its totient is φ = 8406171792000.

The previous prime is 21021211129999. The next prime is 21021211130011. The reversal of 21021211130000 is 3111212012.

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36302747 + ... + 36877253.

Almost surely, 2^{21021211130000} is an apocalyptic number.

21021211130000 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 21021211130000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25454226134040).

21021211130000 is an abundant number, since it is smaller than the sum of its proper divisors (29887241138080).

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

21021211130000 is an equidigital number, since it uses as much as digits as its factorization.

21021211130000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578194 (or 578173 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21021211130000 its reverse (3111212012), we get a palindrome (21024322342012).

The spelling of 21021211130000 in words is "twenty-one trillion, twenty-one billion, two hundred eleven million, one hundred thirty thousand".