211234031223220 has 96 divisors (see below), whose sum is σ = 449425200954240. Its totient is φ = 83389428756480.

The previous prime is 211234031223181. The next prime is 211234031223221. The reversal of 211234031223220 is 22322130432112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211234031223221) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 605006019 + ... + 605355061.

It is an arithmetic number, because the mean of its divisors is an integer number (4681512509940).

Almost surely, 2^{211234031223220} is an apocalyptic number.

211234031223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211234031223220 is an abundant number, since it is smaller than the sum of its proper divisors (238191169731020).

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

211234031223220 is a wasteful number, since it uses less digits than its factorization.

211234031223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350305 (or 350303 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 211234031223220 its reverse (22322130432112), we get a palindrome (233556161655332).

The spelling of 211234031223220 in words is "two hundred eleven trillion, two hundred thirty-four billion, thirty-one million, two hundred twenty-three thousand, two hundred twenty".