211120100220 has 24 divisors (see below), whose sum is σ = 591136280784. Its totient is φ = 56298693376.

The previous prime is 211120100207. The next prime is 211120100231. The reversal of 211120100220 is 22001021112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 211120100196 and 211120100205.

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, 1759334109 + ... + 1759334228.

It is an arithmetic number, because the mean of its divisors is an integer number (24630678366).

Almost surely, 2^211120100220 is an apocalyptic number.

211120100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211120100220 is an abundant number, since it is smaller than the sum of its proper divisors (380016180564).

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

211120100220 is a wasteful number, since it uses less digits than its factorization.

211120100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518668349 (or 3518668347 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211120100220 its reverse (22001021112), we get a palindrome (233121121332).

The spelling of 211120100220 in words is "two hundred eleven billion, one hundred twenty million, one hundred thousand, two hundred twenty".