1221031230 has 32 divisors (see below), whose sum is σ = 2936137248. Its totient is φ = 324979200.

The previous prime is 1221031211. The next prime is 1221031241. The reversal of 1221031230 is 321301221.

1221031230 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23431 + ... + 54690.

It is an arithmetic number, because the mean of its divisors is an integer number (91754289).

Almost surely, 2^1221031230 is an apocalyptic number.

1221031230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221031230 is an abundant number, since it is smaller than the sum of its proper divisors (1715106018).

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

1221031230 is a wasteful number, since it uses less digits than its factorization.

1221031230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78652.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1221031230 is about 34943.2572894972. The cubic root of 1221031230 is about 1068.8307109116.

Adding to 1221031230 its reverse (321301221), we get a palindrome (1542332451).

The spelling of 1221031230 in words is "one billion, two hundred twenty-one million, thirty-one thousand, two hundred thirty".