2120220201321 has 40 divisors (see below), whose sum is σ = 3214840358664. Its totient is φ = 1392380236800.

The previous prime is 2120220201293. The next prime is 2120220201361. The reversal of 2120220201321 is 1231020220212.

2120220201321 is a `hidden beast` number, since 2 + 120 + 2 + 20 + 201 + 321 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1481916675600 + 638303525721 = 1217340^2 + 798939^2 .

It is not a de Polignac number, because 2120220201321 - 2⁹ = 2120220200809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120220201294 and 2120220201303.

It is not an unprimeable number, because it can be changed into a prime (2120220201361) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 953881 + ... + 2269433.

Almost surely, 2^{2120220201321} is an apocalyptic number.

It is an amenable number.

2120220201321 is a deficient number, since it is larger than the sum of its proper divisors (1094620157343).

2120220201321 is a wasteful number, since it uses less digits than its factorization.

2120220201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315863 (or 1315854 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2120220201321 its reverse (1231020220212), we get a palindrome (3351240421533).

The spelling of 2120220201321 in words is "two trillion, one hundred twenty billion, two hundred twenty million, two hundred one thousand, three hundred twenty-one".