21201022101120 has 256 divisors, whose sum is σ = 71253838080000. Its totient is φ = 5347100528640.

The previous prime is 21201022101113. The next prime is 21201022101137. The reversal of 21201022101120 is 2110122010212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21201022101120.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21366405 + ... + 22336635.

It is an arithmetic number, because the mean of its divisors is an integer number (278335305000).

Almost surely, 2^{21201022101120} is an apocalyptic number.

21201022101120 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 21201022101120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35626919040000).

21201022101120 is an abundant number, since it is smaller than the sum of its proper divisors (50052815978880).

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

21201022101120 is a wasteful number, since it uses less digits than its factorization.

21201022101120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970871 (or 970859 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201022101120 its reverse (2110122010212), we get a palindrome (23311144111332).

The spelling of 21201022101120 in words is "twenty-one trillion, two hundred one billion, twenty-two million, one hundred one thousand, one hundred twenty".