211331113220 has 24 divisors (see below), whose sum is σ = 443804524800. Its totient is φ = 84530695392.

The previous prime is 211331113073. The next prime is 211331113237. The reversal of 211331113220 is 22311133112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211331113192 and 211331113201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1367021 + ... + 1513739.

It is an arithmetic number, because the mean of its divisors is an integer number (18491855200).

Almost surely, 2^211331113220 is an apocalyptic number.

211331113220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211331113220 is an abundant number, since it is smaller than the sum of its proper divisors (232473411580).

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

211331113220 is a wasteful number, since it uses less digits than its factorization.

211331113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218747 (or 218745 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211331113220 its reverse (22311133112), we get a palindrome (233642246332).

The spelling of 211331113220 in words is "two hundred eleven billion, three hundred thirty-one million, one hundred thirteen thousand, two hundred twenty".