211100111020220 has 12 divisors (see below), whose sum is σ = 443310233142504. Its totient is φ = 84440044408080.

The previous prime is 211100111020199. The next prime is 211100111020229. The reversal of 211100111020220 is 22020111001112.

It is a junction number, because it is equal to n+sod(n) for n = 211100111020195 and 211100111020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100111020229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5277502775486 + ... + 5277502775525.

It is an arithmetic number, because the mean of its divisors is an integer number (36942519428542).

Almost surely, 2^{211100111020220} is an apocalyptic number.

211100111020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211100111020220 is an abundant number, since it is smaller than the sum of its proper divisors (232210122122284).

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

211100111020220 is a wasteful number, since it uses less digits than its factorization.

211100111020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555005551020 (or 10555005551018 counting only the distinct ones).

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

Adding to 211100111020220 its reverse (22020111001112), we get a palindrome (233120222021332).

The spelling of 211100111020220 in words is "two hundred eleven trillion, one hundred billion, one hundred eleven million, twenty thousand, two hundred twenty".