101112212220 has 192 divisors, whose sum is σ = 311414906880. Its totient is φ = 24398744832.

The previous prime is 101112212207. The next prime is 101112212237. The reversal of 101112212220 is 22212211101.

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 101112212220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21681609 + ... + 21686271.

It is an arithmetic number, because the mean of its divisors is an integer number (1621952640).

Almost surely, 2^101112212220 is an apocalyptic number.

101112212220 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 101112212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155707453440).

101112212220 is an abundant number, since it is smaller than the sum of its proper divisors (210302694660).

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

101112212220 is a wasteful number, since it uses less digits than its factorization.

101112212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5544 (or 5542 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 101112212220 its reverse (22212211101), we get a palindrome (123324423321).

The spelling of 101112212220 in words is "one hundred one billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty".