2123220 has 48 divisors (see below), whose sum is σ = 6487488. Its totient is φ = 514560.

The previous prime is 2123213. The next prime is 2123237. The reversal of 2123220 is 223212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a d-powerful number, because it can be written as 2⁹ + 1 + 2¹² + 3¹³ + 2¹⁸ + 2¹⁸ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 2123196 and 2123205.

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, 949 + ... + 2268.

It is an arithmetic number, because the mean of its divisors is an integer number (135156).

2^2123220 is an apocalyptic number.

2123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123220 is an abundant number, since it is smaller than the sum of its proper divisors (4364268).

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

2123220 is a wasteful number, since it uses less digits than its factorization.

2123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240 (or 3238 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2123220 is about 1457.1273108414. The cubic root of 2123220 is about 128.5281723975.

Adding to 2123220 its reverse (223212), we get a palindrome (2346432).

The spelling of 2123220 in words is "two million, one hundred twenty-three thousand, two hundred twenty".