2120252240221 has 16 divisors (see below), whose sum is σ = 2263962899520. Its totient is φ = 1978687630080.

The previous prime is 2120252240167. The next prime is 2120252240257. The reversal of 2120252240221 is 1220422520212.

It is a cyclic number.

It is not a de Polignac number, because 2120252240221 - 2¹³ = 2120252232029 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 (2120252240261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1320406 + ... + 2446216.

It is an arithmetic number, because the mean of its divisors is an integer number (141497681220).

Almost surely, 2^{2120252240221} is an apocalyptic number.

It is an amenable number.

2120252240221 is a deficient number, since it is larger than the sum of its proper divisors (143710659299).

2120252240221 is a wasteful number, since it uses less digits than its factorization.

2120252240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126764.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 2120252240221 its reverse (1220422520212), we get a palindrome (3340674760433).

The spelling of 2120252240221 in words is "two trillion, one hundred twenty billion, two hundred fifty-two million, two hundred forty thousand, two hundred twenty-one".