2120221121201 has 4 divisors (see below), whose sum is σ = 2120229338112. Its totient is φ = 2120212904292.

The previous prime is 2120221121159. The next prime is 2120221121237. The reversal of 2120221121201 is 1021211220212.

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 2120221121201 - 2¹⁰ = 2120221120177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120221121201.

It is not an unprimeable number, because it can be changed into a prime (2120221121281) 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 3 ways as a sum of consecutive naturals, for example, 3708425 + ... + 4241798.

It is an arithmetic number, because the mean of its divisors is an integer number (530057334528).

Almost surely, 2^{2120221121201} is an apocalyptic number.

It is an amenable number.

2120221121201 is a deficient number, since it is larger than the sum of its proper divisors (8216911).

2120221121201 is an equidigital number, since it uses as much as digits as its factorization.

2120221121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216910.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2120221121201 its reverse (1021211220212), we get a palindrome (3141432341413).

It can be divided in two parts, 2120221 and 121201, that added together give a palindrome (2241422).

The spelling of 2120221121201 in words is "two trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred one".