211111000220020 has 12 divisors (see below), whose sum is σ = 443333100462084. Its totient is φ = 84444400088000.

The previous prime is 211111000219957. The next prime is 211111000220201. The reversal of 211111000220020 is 20022000111112.

It can be written as a sum of positive squares in 2 ways, for example, as 133792990539664 + 77318009680356 = 11566892^2 + 8793066^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5277775005481 + ... + 5277775005520.

It is an arithmetic number, because the mean of its divisors is an integer number (36944425038507).

Almost surely, 2^{211111000220020} is an apocalyptic number.

211111000220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211111000220020 is an abundant number, since it is smaller than the sum of its proper divisors (232222100242064).

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

211111000220020 is a wasteful number, since it uses less digits than its factorization.

211111000220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555550011010 (or 10555550011008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211111000220020 its reverse (20022000111112), we get a palindrome (231133000331132).

The spelling of 211111000220020 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred twenty thousand, twenty".