101222012220 has 384 divisors, whose sum is σ = 339220224000. Its totient is φ = 22072393728.

The previous prime is 101222012209. The next prime is 101222012263. The reversal of 101222012220 is 22210222101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 101222012220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 225438556 + ... + 225439004.

It is an arithmetic number, because the mean of its divisors is an integer number (883386000).

Almost surely, 2^101222012220 is an apocalyptic number.

101222012220 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 101222012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169610112000).

101222012220 is an abundant number, since it is smaller than the sum of its proper divisors (237998211780).

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

101222012220 is a wasteful number, since it uses less digits than its factorization.

101222012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 101222012220 its reverse (22210222101), we get a palindrome (123432234321).

The spelling of 101222012220 in words is "one hundred one billion, two hundred twenty-two million, twelve thousand, two hundred twenty".