2120571338221 has 16 divisors (see below), whose sum is σ = 2463536395008. Its totient is φ = 1787620032000.

The previous prime is 2120571338201. The next prime is 2120571338267. The reversal of 2120571338221 is 1228331750212.

It is a cyclic number.

It is not a de Polignac number, because 2120571338221 - 2¹³ = 2120571330029 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 (2120571338201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3301821 + ... + 3891421.

It is an arithmetic number, because the mean of its divisors is an integer number (153971024688).

Almost surely, 2^{2120571338221} is an apocalyptic number.

It is an amenable number.

2120571338221 is a deficient number, since it is larger than the sum of its proper divisors (342965056787).

2120571338221 is an equidigital number, since it uses as much as digits as its factorization.

2120571338221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598092.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 2120571338221 in words is "two trillion, one hundred twenty billion, five hundred seventy-one million, three hundred thirty-eight thousand, two hundred twenty-one".