2121219858677 has 2 divisors, whose sum is σ = 2121219858678. Its totient is φ = 2121219858676.

The previous prime is 2121219858647. The next prime is 2121219858691. The reversal of 2121219858677 is 7768589121212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254252164356 + 866967694321 = 1119934^2 + 931111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121219858677 - 2⁸ = 2121219858421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121219858617) 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 as a sum of consecutive naturals, namely, 1060609929338 + 1060609929339.

It is an arithmetic number, because the mean of its divisors is an integer number (1060609929339).

Almost surely, 2^{2121219858677} is an apocalyptic number.

It is an amenable number.

2121219858677 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121219858677 is an equidigital number, since it uses as much as digits as its factorization.

2121219858677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 59.

The spelling of 2121219858677 in words is "two trillion, one hundred twenty-one billion, two hundred nineteen million, eight hundred fifty-eight thousand, six hundred seventy-seven".