101221022122220 has 384 divisors, whose sum is σ = 299286758615040. Its totient is φ = 27733112709120.

The previous prime is 101221022122219. The next prime is 101221022122223. The reversal of 101221022122220 is 22221220122101.

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 = 101221022122192 and 101221022122201.

It is not an unprimeable number, because it can be changed into a prime (101221022122223) 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, 41188199 + ... + 43576481.

It is an arithmetic number, because the mean of its divisors is an integer number (779392600560).

Almost surely, 2^{101221022122220} is an apocalyptic number.

101221022122220 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 101221022122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149643379307520).

101221022122220 is an abundant number, since it is smaller than the sum of its proper divisors (198065736492820).

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

101221022122220 is a wasteful number, since it uses less digits than its factorization.

101221022122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388425 (or 2388423 counting only the distinct ones).

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

Adding to 101221022122220 its reverse (22221220122101), we get a palindrome (123442242244321).

The spelling of 101221022122220 in words is "one hundred one trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty".