2121121212277 has 2 divisors, whose sum is σ = 2121121212278. Its totient is φ = 2121121212276.

The previous prime is 2121121212209. The next prime is 2121121212281. The reversal of 2121121212277 is 7722121211212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1812036362161 + 309084850116 = 1346119^2 + 555954^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121121212277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121121212577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060560606138 + 1060560606139.

It is an arithmetic number, because the mean of its divisors is an integer number (1060560606139).

Almost surely, 2^{2121121212277} is an apocalyptic number.

It is an amenable number.

2121121212277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121121212277 is an equidigital number, since it uses as much as digits as its factorization.

2121121212277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3136, while the sum is 31.

Adding to 2121121212277 its reverse (7722121211212), we get a palindrome (9843242423489).

The spelling of 2121121212277 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred seventy-seven".