2121219858977 has 2 divisors, whose sum is σ = 2121219858978. Its totient is φ = 2121219858976.

The previous prime is 2121219858943. The next prime is 2121219859007. The reversal of 2121219858977 is 7798589121212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2104005369361 + 17214489616 = 1450519^2 + 131204^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121219858977 - 2⁶ = 2121219858913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121219858677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060609929488 + 1060609929489.

It is an arithmetic number, because the mean of its divisors is an integer number (1060609929489).

Almost surely, 2^{2121219858977} is an apocalyptic number.

It is an amenable number.

2121219858977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121219858977 is an equidigital number, since it uses as much as digits as its factorization.

2121219858977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 62.

The spelling of 2121219858977 in words is "two trillion, one hundred twenty-one billion, two hundred nineteen million, eight hundred fifty-eight thousand, nine hundred seventy-seven".