20100203101 has 6 divisors (see below), whose sum is σ = 22093611806. Its totient is φ = 18272911800.

The previous prime is 20100203093. The next prime is 20100203141. The reversal of 20100203101 is 10130200102.

It can be written as a sum of positive squares in only one way, i.e., 16965323001 + 3134880100 = 130251^2 + 55990^2 .

It is not a de Polignac number, because 20100203101 - 2³ = 20100203093 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 (20100203141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83058570 + ... + 83058811.

Almost surely, 2^20100203101 is an apocalyptic number.

It is an amenable number.

20100203101 is a deficient number, since it is larger than the sum of its proper divisors (1993408705).

20100203101 is a wasteful number, since it uses less digits than its factorization.

20100203101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166117403 (or 166117392 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20100203101 its reverse (10130200102), we get a palindrome (30230403203).

The spelling of 20100203101 in words is "twenty billion, one hundred million, two hundred three thousand, one hundred one".