1230120220 has 96 divisors (see below), whose sum is σ = 2995937280. Its totient is φ = 415580160.

The previous prime is 1230120209. The next prime is 1230120223. The reversal of 1230120220 is 220210321.

It is a self number, because there is not a number n which added to its sum of digits gives 1230120220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230120223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4786332 + ... + 4786588.

It is an arithmetic number, because the mean of its divisors is an integer number (31207680).

Almost surely, 2^1230120220 is an apocalyptic number.

1230120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497968640).

1230120220 is an abundant number, since it is smaller than the sum of its proper divisors (1765817060).

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

1230120220 is a wasteful number, since it uses less digits than its factorization.

1230120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1230120220 is about 35073.0697259307. The cubic root of 1230120220 is about 1071.4761760520.

Adding to 1230120220 its reverse (220210321), we get a palindrome (1450330541).

The spelling of 1230120220 in words is "one billion, two hundred thirty million, one hundred twenty thousand, two hundred twenty".