211122110121220 has 48 divisors (see below), whose sum is σ = 466708056312960. Its totient is φ = 80001240724224.

The previous prime is 211122110121203. The next prime is 211122110121233. The reversal of 211122110121220 is 22121011221112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248832 + ... + 20550088.

It is an arithmetic number, because the mean of its divisors is an integer number (9723084506520).

Almost surely, 2^{211122110121220} is an apocalyptic number.

211122110121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211122110121220 is an abundant number, since it is smaller than the sum of its proper divisors (255585946191740).

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

211122110121220 is a wasteful number, since it uses less digits than its factorization.

211122110121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20328652 (or 20328650 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211122110121220 its reverse (22121011221112), we get a palindrome (233243121342332).

The spelling of 211122110121220 in words is "two hundred eleven trillion, one hundred twenty-two billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty".