1203221121 has 8 divisors (see below), whose sum is σ = 1698665184. Its totient is φ = 754962240.

The previous prime is 1203221111. The next prime is 1203221183. The reversal of 1203221121 is 1211223021.

1203221121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1203221121 - 2¹⁰ = 1203220097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1203221121.

It is not an unprimeable number, because it can be changed into a prime (1203221101) 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, 11796235 + ... + 11796336.

It is an arithmetic number, because the mean of its divisors is an integer number (212333148).

Almost surely, 2^1203221121 is an apocalyptic number.

It is an amenable number.

1203221121 is a deficient number, since it is larger than the sum of its proper divisors (495444063).

1203221121 is a wasteful number, since it uses less digits than its factorization.

1203221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23592591.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1203221121 is about 34687.4778702632. The cubic root of 1203221121 is about 1063.6085396510.

Adding to 1203221121 its reverse (1211223021), we get a palindrome (2414444142).

It can be divided in two parts, 12032 and 21121, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 1203221121 in words is "one billion, two hundred three million, two hundred twenty-one thousand, one hundred twenty-one".