101220221222120 has 512 divisors, whose sum is σ = 316298207232000. Its totient is φ = 28124833996800.

The previous prime is 101220221222111. The next prime is 101220221222123. The reversal of 101220221222120 is 21222122022101.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 101220221222092 and 101220221222101.

It is not an unprimeable number, because it can be changed into a prime (101220221222123) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 604400156 + ... + 604567604.

It is an arithmetic number, because the mean of its divisors is an integer number (617769936000).

Almost surely, 2^{101220221222120} is an apocalyptic number.

101220221222120 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 101220221222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158149103616000).

101220221222120 is an abundant number, since it is smaller than the sum of its proper divisors (215077986009880).

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

101220221222120 is a wasteful number, since it uses less digits than its factorization.

101220221222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168009 (or 168005 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 101220221222120 its reverse (21222122022101), we get a palindrome (122442343244221).

The spelling of 101220221222120 in words is "one hundred one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty".