2101100023503 has 40 divisors (see below), whose sum is σ = 3489153320576. Its totient is φ = 1251275428800.

The previous prime is 2101100023501. The next prime is 2101100023553. The reversal of 2101100023503 is 3053200011012.

2101100023503 is a `hidden beast` number, since 210 + 1 + 100 + 0 + 2 + 350 + 3 = 666.

It is not a de Polignac number, because 2101100023503 - 2¹ = 2101100023501 is a prime.

It is a super-3 number, since 3×2101100023503³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101100023501) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32150368 + ... + 32215653.

Almost surely, 2^{2101100023503} is an apocalyptic number.

2101100023503 is a deficient number, since it is larger than the sum of its proper divisors (1388053297073).

2101100023503 is a wasteful number, since it uses less digits than its factorization.

2101100023503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64366077 (or 64366068 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 2101100023503 its reverse (3053200011012), we get a palindrome (5154300034515).

The spelling of 2101100023503 in words is "two trillion, one hundred one billion, one hundred million, twenty-three thousand, five hundred three".