2120246221261 has 4 divisors (see below), whose sum is σ = 2423138538592. Its totient is φ = 1817353903932.

The previous prime is 2120246221217. The next prime is 2120246221279. The reversal of 2120246221261 is 1621226420212.

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 not a de Polignac number, because 2120246221261 - 2¹¹ = 2120246219213 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 (2120246221861) 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, 151446158655 + ... + 151446158668.

It is an arithmetic number, because the mean of its divisors is an integer number (605784634648).

Almost surely, 2^{2120246221261} is an apocalyptic number.

It is an amenable number.

2120246221261 is a deficient number, since it is larger than the sum of its proper divisors (302892317331).

2120246221261 is an equidigital number, since it uses as much as digits as its factorization.

2120246221261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302892317330.

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 2120246221261 in words is "two trillion, one hundred twenty billion, two hundred forty-six million, two hundred twenty-one thousand, two hundred sixty-one".