1203121010121 has 16 divisors (see below), whose sum is σ = 1643692964928. Its totient is φ = 782324524800.

The previous prime is 1203121010083. The next prime is 1203121010123. The reversal of 1203121010121 is 1210101213021.

It is not a de Polignac number, because 1203121010121 - 2¹⁸ = 1203120747977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1203121010121.

It is not an unprimeable number, because it can be changed into a prime (1203121010123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 706495 + ... + 1704516.

It is an arithmetic number, because the mean of its divisors is an integer number (102730810308).

Almost surely, 2^{1203121010121} is an apocalyptic number.

It is an amenable number.

1203121010121 is a deficient number, since it is larger than the sum of its proper divisors (440571954807).

1203121010121 is a wasteful number, since it uses less digits than its factorization.

1203121010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415112.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1203121010121 its reverse (1210101213021), we get a palindrome (2413222223142).

The spelling of 1203121010121 in words is "one trillion, two hundred three billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".