2101220403 has 4 divisors (see below), whose sum is σ = 2801627208. Its totient is φ = 1400813600.

The previous prime is 2101220369. The next prime is 2101220411. The reversal of 2101220403 is 3040221012.

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 2101220403 - 2²⁴ = 2084443187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101220483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350203398 + ... + 350203403.

It is an arithmetic number, because the mean of its divisors is an integer number (700406802).

Almost surely, 2^2101220403 is an apocalyptic number.

2101220403 is a deficient number, since it is larger than the sum of its proper divisors (700406805).

2101220403 is an equidigital number, since it uses as much as digits as its factorization.

2101220403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700406804.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2101220403 is about 45839.0707039312. The cubic root of 2101220403 is about 1280.8271840368.

Adding to 2101220403 its reverse (3040221012), we get a palindrome (5141441415).

The spelling of 2101220403 in words is "two billion, one hundred one million, two hundred twenty thousand, four hundred three".