211103211220 has 48 divisors (see below), whose sum is σ = 488313641088. Its totient is φ = 76019506560.

The previous prime is 211103211197. The next prime is 211103211257. The reversal of 211103211220 is 22112301112.

It is a junction number, because it is equal to n+sod(n) for n = 211103211194 and 211103211203.

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, 4635399 + ... + 4680718.

It is an arithmetic number, because the mean of its divisors is an integer number (10173200856).

Almost surely, 2^211103211220 is an apocalyptic number.

211103211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211103211220 is an abundant number, since it is smaller than the sum of its proper divisors (277210429868).

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

211103211220 is a wasteful number, since it uses less digits than its factorization.

211103211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9316240 (or 9316238 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 211103211220 its reverse (22112301112), we get a palindrome (233215512332).

The spelling of 211103211220 in words is "two hundred eleven billion, one hundred three million, two hundred eleven thousand, two hundred twenty".