2100221021203 has 4 divisors (see below), whose sum is σ = 2100237648120. Its totient is φ = 2100204394288.

The previous prime is 2100221021159. The next prime is 2100221021251. The reversal of 2100221021203 is 3021201220012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100221021203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100221061203) 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, 8122525 + ... + 8377102.

It is an arithmetic number, because the mean of its divisors is an integer number (525059412030).

Almost surely, 2^{2100221021203} is an apocalyptic number.

2100221021203 is a deficient number, since it is larger than the sum of its proper divisors (16626917).

2100221021203 is a wasteful number, since it uses less digits than its factorization.

2100221021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16626916.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2100221021203 its reverse (3021201220012), we get a palindrome (5121422241215).

The spelling of 2100221021203 in words is "two trillion, one hundred billion, two hundred twenty-one million, twenty-one thousand, two hundred three".