211111002100220 has 24 divisors (see below), whose sum is σ = 443336005851984. Its totient is φ = 84443848184576.

The previous prime is 211111002100217. The next prime is 211111002100231. The reversal of 211111002100220 is 22001200111112.

It is a junction number, because it is equal to n+sod(n) for n = 211111002100195 and 211111002100204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31401662 + ... + 37527141.

It is an arithmetic number, because the mean of its divisors is an integer number (18472333577166).

Almost surely, 2^{211111002100220} is an apocalyptic number.

211111002100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211111002100220 is an abundant number, since it is smaller than the sum of its proper divisors (232225003751764).

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

211111002100220 is a wasteful number, since it uses less digits than its factorization.

211111002100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69081949 (or 69081947 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211111002100220 its reverse (22001200111112), we get a palindrome (233112202211332).

The spelling of 211111002100220 in words is "two hundred eleven trillion, one hundred eleven billion, two million, one hundred thousand, two hundred twenty".