2021121203 has 4 divisors (see below), whose sum is σ = 2043830520. Its totient is φ = 1998411888.

The previous prime is 2021121191. The next prime is 2021121209. The reversal of 2021121203 is 3021211202.

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 2021121203 - 2⁶ = 2021121139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021121209) 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, 11354525 + ... + 11354702.

It is an arithmetic number, because the mean of its divisors is an integer number (510957630).

Almost surely, 2^2021121203 is an apocalyptic number.

2021121203 is a deficient number, since it is larger than the sum of its proper divisors (22709317).

2021121203 is an equidigital number, since it uses as much as digits as its factorization.

2021121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22709316.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2021121203 is about 44956.8815978155. The cubic root of 2021121203 is about 1264.3407028602.

Adding to 2021121203 its reverse (3021211202), we get a palindrome (5042332405).

It can be divided in two parts, 20211 and 21203, that added together give a palindrome (41414).

The spelling of 2021121203 in words is "two billion, twenty-one million, one hundred twenty-one thousand, two hundred three".