1221201203230 has 16 divisors (see below), whose sum is σ = 2198184789744. Its totient is φ = 488475453760.

The previous prime is 1221201203221. The next prime is 1221201203267. The reversal of 1221201203230 is 323021021221.

It is a junction number, because it is equal to n+sod(n) for n = 1221201203198 and 1221201203207.

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 7 ways as a sum of consecutive naturals, for example, 485829 + ... + 1636591.

It is an arithmetic number, because the mean of its divisors is an integer number (137386549359).

Almost surely, 2^{1221201203230} is an apocalyptic number.

1221201203230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221201203230 is a deficient number, since it is larger than the sum of its proper divisors (976983586514).

1221201203230 is a wasteful number, since it uses less digits than its factorization.

1221201203230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256891.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1221201203230 its reverse (323021021221), we get a palindrome (1544222224451).

The spelling of 1221201203230 in words is "one trillion, two hundred twenty-one billion, two hundred one million, two hundred three thousand, two hundred thirty".