212011101220 has 48 divisors (see below), whose sum is σ = 446792411520. Its totient is φ = 84505849344.

The previous prime is 212011101217. The next prime is 212011101223. The reversal of 212011101220 is 22101110212.

It is an interprime number because it is at equal distance from previous prime (212011101217) and next prime (212011101223).

It is a self number, because there is not a number n which added to its sum of digits gives 212011101220.

It is not an unprimeable number, because it can be changed into a prime (212011101223) 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 15 ways as a sum of consecutive naturals, for example, 13735147 + ... + 13750573.

It is an arithmetic number, because the mean of its divisors is an integer number (9308175240).

Almost surely, 2^212011101220 is an apocalyptic number.

212011101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212011101220 is an abundant number, since it is smaller than the sum of its proper divisors (234781310300).

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

212011101220 is a wasteful number, since it uses less digits than its factorization.

212011101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17812 (or 17810 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212011101220 its reverse (22101110212), we get a palindrome (234112211432).

The spelling of 212011101220 in words is "two hundred twelve billion, eleven million, one hundred one thousand, two hundred twenty".