2021120221201 has 4 divisors (see below), whose sum is σ = 2022505500400. Its totient is φ = 2019734942004.

The previous prime is 2021120221181. The next prime is 2021120221223. The reversal of 2021120221201 is 1021220211202.

It is a happy number.

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 2021120221201 - 2²¹ = 2021118124049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021120221261) 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, 692637411 + ... + 692640328.

It is an arithmetic number, because the mean of its divisors is an integer number (505626375100).

Almost surely, 2^{2021120221201} is an apocalyptic number.

It is an amenable number.

2021120221201 is a deficient number, since it is larger than the sum of its proper divisors (1385279199).

2021120221201 is a wasteful number, since it uses less digits than its factorization.

2021120221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385279198.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021120221201 its reverse (1021220211202), we get a palindrome (3042340432403).

Subtracting from 2021120221201 its reverse (1021220211202), we obtain a palindrome (999900009999).

The spelling of 2021120221201 in words is "two trillion, twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, two hundred one".