211120221220220 has 24 divisors (see below), whose sum is σ = 477456500298624. Its totient is φ = 77952081681216.

The previous prime is 211120221220217. The next prime is 211120221220277. The reversal of 211120221220220 is 22022122021112.

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 = 211120221220192 and 211120221220201.

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, 406000425164 + ... + 406000425683.

It is an arithmetic number, because the mean of its divisors is an integer number (19894020845776).

Almost surely, 2^{211120221220220} is an apocalyptic number.

211120221220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211120221220220 is an abundant number, since it is smaller than the sum of its proper divisors (266336279078404).

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

211120221220220 is a wasteful number, since it uses less digits than its factorization.

211120221220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812000850869 (or 812000850867 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 211120221220220 its reverse (22022122021112), we get a palindrome (233142343241332).

The spelling of 211120221220220 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty".