2120122011221 has 8 divisors (see below), whose sum is σ = 2149190280600. Its totient is φ = 2091054431232.

The previous prime is 2120122011199. The next prime is 2120122011253. The reversal of 2120122011221 is 1221102210212.

It can be written as a sum of positive squares in 4 ways, for example, as 303055755025 + 1817066256196 = 550505^2 + 1347986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120122011221 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 2120122011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120122011521) 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, 10621091 + ... + 10818863.

It is an arithmetic number, because the mean of its divisors is an integer number (268648785075).

Almost surely, 2^{2120122011221} is an apocalyptic number.

It is an amenable number.

2120122011221 is a deficient number, since it is larger than the sum of its proper divisors (29068269379).

2120122011221 is a wasteful number, since it uses less digits than its factorization.

2120122011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344695.

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

Adding to 2120122011221 its reverse (1221102210212), we get a palindrome (3341224221433).

The spelling of 2120122011221 in words is "two trillion, one hundred twenty billion, one hundred twenty-two million, eleven thousand, two hundred twenty-one".