211302320220 has 120 divisors (see below), whose sum is σ = 663132210048. Its totient is φ = 56324419200.

The previous prime is 211302320189. The next prime is 211302320237. The reversal of 211302320220 is 22023203112.

211302320220 is a `hidden beast` number, since 21 + 1 + 302 + 320 + 2 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211302320193 and 211302320202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4172250 + ... + 4222590.

Almost surely, 2^211302320220 is an apocalyptic number.

211302320220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211302320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331566105024).

211302320220 is an abundant number, since it is smaller than the sum of its proper divisors (451829889828).

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

211302320220 is a wasteful number, since it uses less digits than its factorization.

211302320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52953 (or 52942 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 211302320220 its reverse (22023203112), we get a palindrome (233325523332).

The spelling of 211302320220 in words is "two hundred eleven billion, three hundred two million, three hundred twenty thousand, two hundred twenty".