1213230220 has 48 divisors (see below), whose sum is σ = 2702202048. Its totient is φ = 456572160.

The previous prime is 1213230209. The next prime is 1213230241. The reversal of 1213230220 is 220323121.

It is a junction number, because it is equal to n+sod(n) for n = 1213230194 and 1213230203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6442 + ... + 49678.

It is an arithmetic number, because the mean of its divisors is an integer number (56295876).

Almost surely, 2^1213230220 is an apocalyptic number.

1213230220 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 1213230220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351101024).

1213230220 is an abundant number, since it is smaller than the sum of its proper divisors (1488971828).

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

1213230220 is a wasteful number, since it uses less digits than its factorization.

1213230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43330 (or 43328 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1213230220 is about 34831.4544628845. The cubic root of 1213230220 is about 1066.5496392878.

Adding to 1213230220 its reverse (220323121), we get a palindrome (1433553341).

The spelling of 1213230220 in words is "one billion, two hundred thirteen million, two hundred thirty thousand, two hundred twenty".