211221023320 has 64 divisors (see below), whose sum is σ = 477203973120. Its totient is φ = 84140913024.

The previous prime is 211221023291. The next prime is 211221023399. The reversal of 211221023320 is 23320122112.

211221023320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211221023320² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24254407 + ... + 24263113.

It is an arithmetic number, because the mean of its divisors is an integer number (7456312080).

Almost surely, 2^211221023320 is an apocalyptic number.

211221023320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211221023320 is an abundant number, since it is smaller than the sum of its proper divisors (265982949800).

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

211221023320 is a wasteful number, since it uses less digits than its factorization.

211221023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11144 (or 11140 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 211221023320 its reverse (23320122112), we get a palindrome (234541145432).

The spelling of 211221023320 in words is "two hundred eleven billion, two hundred twenty-one million, twenty-three thousand, three hundred twenty".