101021002221220 has 24 divisors (see below), whose sum is σ = 212144457660408. Its totient is φ = 40408333651200.

The previous prime is 101021002221203. The next prime is 101021002221221. The reversal of 101021002221220 is 22122200120101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25167319023616 + 75853683197604 = 5016704^2 + 8709402^2 .

It is a junction number, because it is equal to n+sod(n) for n = 101021002221194 and 101021002221203.

It is not an unprimeable number, because it can be changed into a prime (101021002221221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9153030 + ... + 16906210.

It is an arithmetic number, because the mean of its divisors is an integer number (8839352402517).

Almost surely, 2^{101021002221220} is an apocalyptic number.

101021002221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101021002221220 is an abundant number, since it is smaller than the sum of its proper divisors (111123455439188).

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

101021002221220 is a wasteful number, since it uses less digits than its factorization.

101021002221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8404671 (or 8404669 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 101021002221220 its reverse (22122200120101), we get a palindrome (123143202341321).

The spelling of 101021002221220 in words is "one hundred one trillion, twenty-one billion, two million, two hundred twenty-one thousand, two hundred twenty".