2121200211077 has 2 divisors, whose sum is σ = 2121200211078. Its totient is φ = 2121200211076.

The previous prime is 2121200211043. The next prime is 2121200211101. The reversal of 2121200211077 is 7701120021212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1655522262241 + 465677948836 = 1286671^2 + 682406^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121200211077 - 2¹⁰ = 2121200210053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121200211037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060600105538 + 1060600105539.

It is an arithmetic number, because the mean of its divisors is an integer number (1060600105539).

Almost surely, 2^{2121200211077} is an apocalyptic number.

It is an amenable number.

2121200211077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121200211077 is an equidigital number, since it uses as much as digits as its factorization.

2121200211077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 2121200211077 its reverse (7701120021212), we get a palindrome (9822320232289).

The spelling of 2121200211077 in words is "two trillion, one hundred twenty-one billion, two hundred million, two hundred eleven thousand, seventy-seven".