2021121301 has 4 divisors (see below), whose sum is σ = 2022412672. Its totient is φ = 2019829932.

The previous prime is 2021121293. The next prime is 2021121329. The reversal of 2021121301 is 1031211202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021121301 - 2³ = 2021121293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021121901) 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 3 ways as a sum of consecutive naturals, for example, 643335 + ... + 646468.

It is an arithmetic number, because the mean of its divisors is an integer number (505603168).

Almost surely, 2^2021121301 is an apocalyptic number.

It is an amenable number.

2021121301 is a deficient number, since it is larger than the sum of its proper divisors (1291371).

2021121301 is a wasteful number, since it uses less digits than its factorization.

2021121301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291370.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2021121301 is about 44956.8826877487. The cubic root of 2021121301 is about 1264.3407232953.

Adding to 2021121301 its reverse (1031211202), we get a palindrome (3052332503).

The spelling of 2021121301 in words is "two billion, twenty-one million, one hundred twenty-one thousand, three hundred one".