1221212013230 has 32 divisors (see below), whose sum is σ = 2398629058560. Its totient is φ = 443963625120.

The previous prime is 1221212013173. The next prime is 1221212013317. The reversal of 1221212013230 is 323102121221.

It is a super-4 number, since 4×1221212013230⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985334 + ... + 1847513.

It is an arithmetic number, because the mean of its divisors is an integer number (74957158080).

Almost surely, 2^{1221212013230} is an apocalyptic number.

1221212013230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221212013230 is a deficient number, since it is larger than the sum of its proper divisors (1177417045330).

1221212013230 is a wasteful number, since it uses less digits than its factorization.

1221212013230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836784.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1221212013230 its reverse (323102121221), we get a palindrome (1544314134451).

The spelling of 1221212013230 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, thirteen thousand, two hundred thirty".