211101212222220 has 96 divisors (see below), whose sum is σ = 591975912487680. Its totient is φ = 56208686342400.

The previous prime is 211101212222209. The next prime is 211101212222227. The reversal of 211101212222220 is 22222212101112.

It is not an unprimeable number, because it can be changed into a prime (211101212222227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215224071 + ... + 216202689.

It is an arithmetic number, because the mean of its divisors is an integer number (6166415755080).

Almost surely, 2^{211101212222220} is an apocalyptic number.

211101212222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211101212222220 is an abundant number, since it is smaller than the sum of its proper divisors (380874700265460).

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

211101212222220 is a wasteful number, since it uses less digits than its factorization.

211101212222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984055 (or 984053 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211101212222220 its reverse (22222212101112), we get a palindrome (233323424323332).

The spelling of 211101212222220 in words is "two hundred eleven trillion, one hundred one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty".