211101200220 has 72 divisors (see below), whose sum is σ = 627898292784. Its totient is φ = 52982257664.

The previous prime is 211101200213. The next prime is 211101200227. The reversal of 211101200220 is 22002101112.

It is an interprime number because it is at equal distance from previous prime (211101200213) and next prime (211101200227).

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 = 211101200196 and 211101200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101200227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6069777 + ... + 6104456.

It is an arithmetic number, because the mean of its divisors is an integer number (8720809622).

Almost surely, 2^211101200220 is an apocalyptic number.

211101200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211101200220 is an abundant number, since it is smaller than the sum of its proper divisors (416797092564).

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

211101200220 is a wasteful number, since it uses less digits than its factorization.

211101200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12174279 (or 12174260 counting only the distinct ones).

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

Adding to 211101200220 its reverse (22002101112), we get a palindrome (233103301332).

The spelling of 211101200220 in words is "two hundred eleven billion, one hundred one million, two hundred thousand, two hundred twenty".