21201101020000 has 240 divisors, whose sum is σ = 57262025498832. Its totient is φ = 7660373760000.

The previous prime is 21201101019997. The next prime is 21201101020009. The reversal of 21201101020000 is 2010110212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201101020009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34233094 + ... + 34846906.

Almost surely, 2^{21201101020000} is an apocalyptic number.

21201101020000 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 21201101020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28631012749416).

21201101020000 is an abundant number, since it is smaller than the sum of its proper divisors (36060924478832).

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

21201101020000 is a wasteful number, since it uses less digits than its factorization.

21201101020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614011 (or 613988 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21201101020000 its reverse (2010110212), we get a palindrome (21203111130212).

The spelling of 21201101020000 in words is "twenty-one trillion, two hundred one billion, one hundred one million, twenty thousand".