10203121109 has 4 divisors (see below), whose sum is σ = 10532254080. Its totient is φ = 9873988140.

The previous prime is 10203121079. The next prime is 10203121139. The reversal of 10203121109 is 90112130201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90112130201 = 97 ⋅928991033.

It is an interprime number because it is at equal distance from previous prime (10203121079) and next prime (10203121139).

It is a cyclic number.

It is not a de Polignac number, because 10203121109 - 2³² = 5908153813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10203121139) 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, 164566439 + ... + 164566500.

It is an arithmetic number, because the mean of its divisors is an integer number (2633063520).

Almost surely, 2^10203121109 is an apocalyptic number.

It is an amenable number.

10203121109 is a deficient number, since it is larger than the sum of its proper divisors (329132971).

10203121109 is an equidigital number, since it uses as much as digits as its factorization.

10203121109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329132970.

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

The spelling of 10203121109 in words is "ten billion, two hundred three million, one hundred twenty-one thousand, one hundred nine".