10101221120 has 72 divisors (see below), whose sum is σ = 24536584800. Its totient is φ = 3983544320.

The previous prime is 10101221113. The next prime is 10101221171. The reversal of 10101221120 is 2112210101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35306 + ... + 146454.

It is an arithmetic number, because the mean of its divisors is an integer number (340785900).

Almost surely, 2^10101221120 is an apocalyptic number.

10101221120 is a gapful number since it is divisible by the number (10) 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 10101221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12268292400).

10101221120 is an abundant number, since it is smaller than the sum of its proper divisors (14435363680).

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

10101221120 is an equidigital number, since it uses as much as digits as its factorization.

10101221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111241 (or 111227 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10101221120 its reverse (2112210101), we get a palindrome (12213431221).

The spelling of 10101221120 in words is "ten billion, one hundred one million, two hundred twenty-one thousand, one hundred twenty".