103111220 has 12 divisors (see below), whose sum is σ = 216533604. Its totient is φ = 41244480.

The previous prime is 103111213. The next prime is 103111247. The reversal of 103111220 is 22111301.

It can be written as a sum of positive squares in 2 ways, for example, as 73994404 + 29116816 = 8602^2 + 5396^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2577761 + ... + 2577800.

It is an arithmetic number, because the mean of its divisors is an integer number (18044467).

Almost surely, 2^103111220 is an apocalyptic number.

103111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103111220 is an abundant number, since it is smaller than the sum of its proper divisors (113422384).

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

103111220 is a wasteful number, since it uses less digits than its factorization.

103111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155570 (or 5155568 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 103111220 is about 10154.3695028298. The cubic root of 103111220 is about 468.9234754662.

Adding to 103111220 its reverse (22111301), we get a palindrome (125222521).

The spelling of 103111220 in words is "one hundred three million, one hundred eleven thousand, two hundred twenty".