2101220120203 has 4 divisors (see below), whose sum is σ = 2103616039120. Its totient is φ = 2098824201288.

The previous prime is 2101220120201. The next prime is 2101220120221. The reversal of 2101220120203 is 3020210221012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2101220120203 - 2¹ = 2101220120201 is a prime.

It is a super-2 number, since 2×2101220120203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101220120201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197958143 + ... + 1197959896.

It is an arithmetic number, because the mean of its divisors is an integer number (525904009780).

Almost surely, 2^{2101220120203} is an apocalyptic number.

2101220120203 is a deficient number, since it is larger than the sum of its proper divisors (2395918917).

2101220120203 is an equidigital number, since it uses as much as digits as its factorization.

2101220120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395918916.

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

Adding to 2101220120203 its reverse (3020210221012), we get a palindrome (5121430341215).

The spelling of 2101220120203 in words is "two trillion, one hundred one billion, two hundred twenty million, one hundred twenty thousand, two hundred three".