211011212212220 has 24 divisors (see below), whose sum is σ = 506426909309664. Its totient is φ = 72346701329856.

The previous prime is 211011212212211. The next prime is 211011212212231. The reversal of 211011212212220 is 22212212110112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211011212212192 and 211011212212201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753611472047 + ... + 753611472326.

It is an arithmetic number, because the mean of its divisors is an integer number (21101121221236).

Almost surely, 2^{211011212212220} is an apocalyptic number.

211011212212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211011212212220 is an abundant number, since it is smaller than the sum of its proper divisors (295415697097444).

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

211011212212220 is a wasteful number, since it uses less digits than its factorization.

211011212212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507222944389 (or 1507222944387 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211011212212220 its reverse (22212212110112), we get a palindrome (233223424322332).

The spelling of 211011212212220 in words is "two hundred eleven trillion, eleven billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty".