2120211232261 has 2 divisors, whose sum is σ = 2120211232262. Its totient is φ = 2120211232260.

The previous prime is 2120211232247. The next prime is 2120211232273. The reversal of 2120211232261 is 1622321120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2035989388161 + 84221844100 = 1426881^2 + 290210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120211232261 - 2²⁷ = 2120077014533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120211232211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060105616130 + 1060105616131.

It is an arithmetic number, because the mean of its divisors is an integer number (1060105616131).

Almost surely, 2^{2120211232261} is an apocalyptic number.

It is an amenable number.

2120211232261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120211232261 is an equidigital number, since it uses as much as digits as its factorization.

2120211232261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 2120211232261 its reverse (1622321120212), we get a palindrome (3742532352473).

The spelling of 2120211232261 in words is "two trillion, one hundred twenty billion, two hundred eleven million, two hundred thirty-two thousand, two hundred sixty-one".