121031103203 has 4 divisors (see below), whose sum is σ = 128150579880. Its totient is φ = 113911626528.

The previous prime is 121031103191. The next prime is 121031103239. The reversal of 121031103203 is 302301130121.

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 121031103203 - 2⁴ = 121031103187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7119476659 = 121031103203 / (1 + 2 + 1 + 0 + 3 + 1 + 1 + 0 + 3 + 2 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121031103283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3559738313 + ... + 3559738346.

It is an arithmetic number, because the mean of its divisors is an integer number (32037644970).

Almost surely, 2^121031103203 is an apocalyptic number.

121031103203 is a deficient number, since it is larger than the sum of its proper divisors (7119476677).

121031103203 is an equidigital number, since it uses as much as digits as its factorization.

121031103203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7119476676.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 121031103203 its reverse (302301130121), we get a palindrome (423332233324).

The spelling of 121031103203 in words is "one hundred twenty-one billion, thirty-one million, one hundred three thousand, two hundred three".