1203121112122 has 4 divisors (see below), whose sum is σ = 1804681668186. Its totient is φ = 601560556060.

The previous prime is 1203121112021. The next prime is 1203121112189. The reversal of 1203121112122 is 2212111213021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1165274911441 + 37846200681 = 1079479^2 + 194541^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1203121112122.

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 as a sum of consecutive naturals, namely, 300780278029 + ... + 300780278032.

Almost surely, 2^{1203121112122} is an apocalyptic number.

1203121112122 is a deficient number, since it is larger than the sum of its proper divisors (601560556064).

1203121112122 is an equidigital number, since it uses as much as digits as its factorization.

1203121112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601560556063.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1203121112122 its reverse (2212111213021), we get a palindrome (3415232325143).

The spelling of 1203121112122 in words is "one trillion, two hundred three billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twenty-two".