2121052776877 has 2 divisors, whose sum is σ = 2121052776878. Its totient is φ = 2121052776876.

The previous prime is 2121052776853. The next prime is 2121052776893. The reversal of 2121052776877 is 7786772501212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1919302681321 + 201750095556 = 1385389^2 + 449166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121052776877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121052776377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060526388438 + 1060526388439.

It is an arithmetic number, because the mean of its divisors is an integer number (1060526388439).

Almost surely, 2^{2121052776877} is an apocalyptic number.

It is an amenable number.

2121052776877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121052776877 is an equidigital number, since it uses as much as digits as its factorization.

2121052776877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4609920, while the sum is 55.

The spelling of 2121052776877 in words is "two trillion, one hundred twenty-one billion, fifty-two million, seven hundred seventy-six thousand, eight hundred seventy-seven".