1220121203 has 8 divisors (see below), whose sum is σ = 1410092640. Its totient is φ = 1034066880.

The previous prime is 1220121169. The next prime is 1220121247. The reversal of 1220121203 is 3021210221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220121203 - 2¹⁰ = 1220120179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220121283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978608 + ... + 979853.

It is an arithmetic number, because the mean of its divisors is an integer number (176261580).

Almost surely, 2^1220121203 is an apocalyptic number.

1220121203 is a deficient number, since it is larger than the sum of its proper divisors (189971437).

1220121203 is an equidigital number, since it uses as much as digits as its factorization.

1220121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958557.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1220121203 is about 34930.2333659539. The cubic root of 1220121203 is about 1068.5651139523.

Adding to 1220121203 its reverse (3021210221), we get a palindrome (4241331424).

The spelling of 1220121203 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred three".