211112212012020 has 192 divisors, whose sum is σ = 716759011987200. Its totient is φ = 51160363845120.

The previous prime is 211112212011983. The next prime is 211112212012067. The reversal of 211112212012020 is 20210212211112.

211112212012020 is a `hidden beast` number, since 211 + 11 + 221 + 20 + 1 + 202 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211112212011984 and 211112212012002.

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, 10195062 + ... + 22938258.

It is an arithmetic number, because the mean of its divisors is an integer number (3733119854100).

Almost surely, 2^{211112212012020} is an apocalyptic number.

211112212012020 is a gapful number since it is divisible by the number (20) 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 211112212012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358379505993600).

211112212012020 is an abundant number, since it is smaller than the sum of its proper divisors (505646799975180).

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

211112212012020 is a wasteful number, since it uses less digits than its factorization.

211112212012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12746015 (or 12746007 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211112212012020 its reverse (20210212211112), we get a palindrome (231322424223132).

The spelling of 211112212012020 in words is "two hundred eleven trillion, one hundred twelve billion, two hundred twelve million, twelve thousand, twenty".