103011220 has 24 divisors (see below), whose sum is σ = 232964424. Its totient is φ = 38034816.

The previous prime is 103011203. The next prime is 103011221. The reversal of 103011220 is 22110301.

It can be written as a sum of positive squares in 4 ways, for example, as 3370896 + 99640324 = 1836^2 + 9982^2 .

It is a super-2 number, since 2×103011220² = 21222622891776800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 103011197 and 103011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103011221) by changing a digit.

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, 197839 + ... + 198358.

It is an arithmetic number, because the mean of its divisors is an integer number (9706851).

Almost surely, 2^103011220 is an apocalyptic number.

103011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103011220 is an abundant number, since it is smaller than the sum of its proper divisors (129953204).

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

103011220 is a wasteful number, since it uses less digits than its factorization.

103011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396219 (or 396217 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 103011220 is about 10149.4443197645. Note that the first 3 decimals coincide. The cubic root of 103011220 is about 468.7718349533.

Adding to 103011220 its reverse (22110301), we get a palindrome (125121521).

The spelling of 103011220 in words is "one hundred three million, eleven thousand, two hundred twenty".