2021001210221 has 4 divisors (see below), whose sum is σ = 2309715668832. Its totient is φ = 1732286751612.

The previous prime is 2021001210209. The next prime is 2021001210223. The reversal of 2021001210221 is 1220121001202.

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 2021001210221 - 2⁶ = 2021001210157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021001210196 and 2021001210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021001210223) 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, 144357229295 + ... + 144357229308.

It is an arithmetic number, because the mean of its divisors is an integer number (577428917208).

Almost surely, 2^{2021001210221} is an apocalyptic number.

It is an amenable number.

2021001210221 is a deficient number, since it is larger than the sum of its proper divisors (288714458611).

2021001210221 is an equidigital number, since it uses as much as digits as its factorization.

2021001210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288714458610.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021001210221 its reverse (1220121001202), we get a palindrome (3241122211423).

The spelling of 2021001210221 in words is "two trillion, twenty-one billion, one million, two hundred ten thousand, two hundred twenty-one".