101021201220 has 192 divisors, whose sum is σ = 305697079296. Its totient is φ = 24863139840.

The previous prime is 101021201089. The next prime is 101021201227. The reversal of 101021201220 is 22102120101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 101021201196 and 101021201205.

It is not an unprimeable number, because it can be changed into a prime (101021201227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4594092 + ... + 4616028.

It is an arithmetic number, because the mean of its divisors is an integer number (1592172288).

Almost surely, 2^101021201220 is an apocalyptic number.

101021201220 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 101021201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152848539648).

101021201220 is an abundant number, since it is smaller than the sum of its proper divisors (204675878076).

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

101021201220 is a wasteful number, since it uses less digits than its factorization.

101021201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22090 (or 22088 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101021201220 its reverse (22102120101), we get a palindrome (123123321321).

The spelling of 101021201220 in words is "one hundred one billion, twenty-one million, two hundred one thousand, two hundred twenty".