1211121022061 has 2 divisors, whose sum is σ = 1211121022062. Its totient is φ = 1211121022060.

The previous prime is 1211121021967. The next prime is 1211121022093. The reversal of 1211121022061 is 1602201211121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1174230137161 + 36890884900 = 1083619^2 + 192070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211121022061 - 2³⁰ = 1210047280237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211121022561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605560511030 + 605560511031.

It is an arithmetic number, because the mean of its divisors is an integer number (605560511031).

Almost surely, 2^{1211121022061} is an apocalyptic number.

It is an amenable number.

1211121022061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211121022061 is an equidigital number, since it uses as much as digits as its factorization.

1211121022061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 1211121022061 its reverse (1602201211121), we get a palindrome (2813322233182).

The spelling of 1211121022061 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, twenty-two thousand, sixty-one".