2103199866621 has 96 divisors (see below), whose sum is σ = 3739474702080. Its totient is φ = 1115625747456.

The previous prime is 2103199866619. The next prime is 2103199866623. The reversal of 2103199866621 is 1266689913012.

It is an interprime number because it is at equal distance from previous prime (2103199866619) and next prime (2103199866623).

It is not a de Polignac number, because 2103199866621 - 2¹ = 2103199866619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103199866623) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22548346 + ... + 22641428.

It is an arithmetic number, because the mean of its divisors is an integer number (38952861480).

Almost surely, 2^{2103199866621} is an apocalyptic number.

2103199866621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2103199866621 is a deficient number, since it is larger than the sum of its proper divisors (1636274835459).

2103199866621 is an equidigital number, since it uses as much as digits as its factorization.

2103199866621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93220 (or 93183 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 2103199866621 in words is "two trillion, one hundred three billion, one hundred ninety-nine million, eight hundred sixty-six thousand, six hundred twenty-one".