211112201220020 has 24 divisors (see below), whose sum is σ = 444971547379968. Its totient is φ = 84133275760800.

The previous prime is 211112201220001. The next prime is 211112201220043. The reversal of 211112201220020 is 20022102211112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19475289896 + ... + 19475300735.

It is an arithmetic number, because the mean of its divisors is an integer number (18540481140832).

Almost surely, 2^{211112201220020} is an apocalyptic number.

211112201220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211112201220020 is an abundant number, since it is smaller than the sum of its proper divisors (233859346159948).

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

211112201220020 is a wasteful number, since it uses less digits than its factorization.

211112201220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38950590911 (or 38950590909 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211112201220020 its reverse (20022102211112), we get a palindrome (231134303431132).

The spelling of 211112201220020 in words is "two hundred eleven trillion, one hundred twelve billion, two hundred one million, two hundred twenty thousand, twenty".