121011311031203 has 4 divisors (see below), whose sum is σ = 121259794216560. Its totient is φ = 120762827845848.

The previous prime is 121011311031179. The next prime is 121011311031211. The reversal of 121011311031203 is 302130113110121.

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

It is a cyclic number.

It is not a de Polignac number, because 121011311031203 - 2¹⁰ = 121011311030179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121011311031103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124241591948 + ... + 124241592921.

It is an arithmetic number, because the mean of its divisors is an integer number (30314948554140).

Almost surely, 2^{121011311031203} is an apocalyptic number.

121011311031203 is a deficient number, since it is larger than the sum of its proper divisors (248483185357).

121011311031203 is an equidigital number, since it uses as much as digits as its factorization.

121011311031203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248483185356.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 121011311031203 its reverse (302130113110121), we get a palindrome (423141424141324).

The spelling of 121011311031203 in words is "one hundred twenty-one trillion, eleven billion, three hundred eleven million, thirty-one thousand, two hundred three".