211313220220 has 48 divisors (see below), whose sum is σ = 451385373600. Its totient is φ = 83078037504.

The previous prime is 211313220197. The next prime is 211313220229. The reversal of 211313220220 is 22022313112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211313220229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426052 + ... + 777268.

It is an arithmetic number, because the mean of its divisors is an integer number (9403861950).

Almost surely, 2^211313220220 is an apocalyptic number.

211313220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211313220220 is an abundant number, since it is smaller than the sum of its proper divisors (240072153380).

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

211313220220 is a wasteful number, since it uses less digits than its factorization.

211313220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351742 (or 351740 counting only the distinct ones).

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

Adding to 211313220220 its reverse (22022313112), we get a palindrome (233335533332).

The spelling of 211313220220 in words is "two hundred eleven billion, three hundred thirteen million, two hundred twenty thousand, two hundred twenty".