2121420203 has 16 divisors (see below), whose sum is σ = 2548385280. Its totient is φ = 1726587456.

The previous prime is 2121420187. The next prime is 2121420221. The reversal of 2121420203 is 3020241212.

It is a cyclic number.

It is not a de Polignac number, because 2121420203 - 2⁴ = 2121420187 is a prime.

It is a super-2 number, since 2×2121420203² = 9000847355393122418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121420283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26033 + ... + 70146.

It is an arithmetic number, because the mean of its divisors is an integer number (159274080).

Almost surely, 2^2121420203 is an apocalyptic number.

2121420203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2121420203 is a deficient number, since it is larger than the sum of its proper divisors (426965077).

2121420203 is a wasteful number, since it uses less digits than its factorization.

2121420203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96346.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2121420203 is about 46058.8775699105. The cubic root of 2121420203 is about 1284.9184549585.

Adding to 2121420203 its reverse (3020241212), we get a palindrome (5141661415).

The spelling of 2121420203 in words is "two billion, one hundred twenty-one million, four hundred twenty thousand, two hundred three".