2120220220221 has 8 divisors (see below), whose sum is σ = 3141066992960. Its totient is φ = 1413480146796.

The previous prime is 2120220220219. The next prime is 2120220220229. The reversal of 2120220220221 is 1220220220212.

2120220220221 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 220 + 220 + 221 = 666.

It is not a de Polignac number, because 2120220220221 - 2¹ = 2120220220219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2120220220194 and 2120220220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120220220229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39263337385 + ... + 39263337438.

It is an arithmetic number, because the mean of its divisors is an integer number (392633374120).

Almost surely, 2^{2120220220221} is an apocalyptic number.

It is an amenable number.

2120220220221 is a deficient number, since it is larger than the sum of its proper divisors (1020846772739).

2120220220221 is an equidigital number, since it uses as much as digits as its factorization.

2120220220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78526674832 (or 78526674826 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2120220220221 its reverse (1220220220212), we get a palindrome (3340440440433).

Subtracting from 2120220220221 its reverse (1220220220212), we obtain a palindrome (900000000009).

The spelling of 2120220220221 in words is "two trillion, one hundred twenty billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty-one".