203020321109 has 8 divisors (see below), whose sum is σ = 217014299712. Its totient is φ = 189456926560.

The previous prime is 203020321087. The next prime is 203020321171. The reversal of 203020321109 is 901123020302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203020321109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203020351109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107645039 + ... + 107646924.

It is an arithmetic number, because the mean of its divisors is an integer number (27126787464).

Almost surely, 2^203020321109 is an apocalyptic number.

It is an amenable number.

203020321109 is a deficient number, since it is larger than the sum of its proper divisors (13993978603).

203020321109 is a wasteful number, since it uses less digits than its factorization.

203020321109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215292027.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 203020321109 in words is "two hundred three billion, twenty million, three hundred twenty-one thousand, one hundred nine".