2021110010221 has 4 divisors (see below), whose sum is σ = 2064112350912. Its totient is φ = 1978107669532.

The previous prime is 2021110010201. The next prime is 2021110010243. The reversal of 2021110010221 is 1220100111202.

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 2021110010221 - 2¹³ = 2021110002029 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 (2021110010201) 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, 21501170275 + ... + 21501170368.

It is an arithmetic number, because the mean of its divisors is an integer number (516028087728).

Almost surely, 2^{2021110010221} is an apocalyptic number.

It is an amenable number.

2021110010221 is a deficient number, since it is larger than the sum of its proper divisors (43002340691).

2021110010221 is an equidigital number, since it uses as much as digits as its factorization.

2021110010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43002340690.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021110010221 its reverse (1220100111202), we get a palindrome (3241210121423).

The spelling of 2021110010221 in words is "two trillion, twenty-one billion, one hundred ten million, ten thousand, two hundred twenty-one".