1203222121 has 4 divisors (see below), whose sum is σ = 1232569044. Its totient is φ = 1173875200.

The previous prime is 1203222103. The next prime is 1203222131. The reversal of 1203222121 is 1212223021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1212223021 = 313 ⋅3872917.

It can be written as a sum of positive squares in 2 ways, for example, as 441462121 + 761760000 = 21011^2 + 27600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203222121 - 2⁵ = 1203222089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203222095 and 1203222104.

It is not an unprimeable number, because it can be changed into a prime (1203222131) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14673400 + ... + 14673481.

It is an arithmetic number, because the mean of its divisors is an integer number (308142261).

Almost surely, 2^1203222121 is an apocalyptic number.

It is an amenable number.

1203222121 is a deficient number, since it is larger than the sum of its proper divisors (29346923).

1203222121 is an equidigital number, since it uses as much as digits as its factorization.

1203222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29346922.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1203222121 is about 34687.4922846838. The cubic root of 1203222121 is about 1063.6088343068.

Adding to 1203222121 its reverse (1212223021), we get a palindrome (2415445142).

The spelling of 1203222121 in words is "one billion, two hundred three million, two hundred twenty-two thousand, one hundred twenty-one".