211320303020 has 96 divisors (see below), whose sum is σ = 480403768320. Its totient is φ = 77777300480.

The previous prime is 211320302959. The next prime is 211320303031. The reversal of 211320303020 is 20303023112.

It is a super-2 number, since 2×211320303020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 211320303020.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15509771 + ... + 15523389.

It is an arithmetic number, because the mean of its divisors is an integer number (5004205920).

Almost surely, 2^211320303020 is an apocalyptic number.

211320303020 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 211320303020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240201884160).

211320303020 is an abundant number, since it is smaller than the sum of its proper divisors (269083465300).

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

211320303020 is a wasteful number, since it uses less digits than its factorization.

211320303020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14663 (or 14661 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 211320303020 its reverse (20303023112), we get a palindrome (231623326132).

The spelling of 211320303020 in words is "two hundred eleven billion, three hundred twenty million, three hundred three thousand, twenty".