2121023202877 has 2 divisors, whose sum is σ = 2121023202878. Its totient is φ = 2121023202876.

The previous prime is 2121023202863. The next prime is 2121023202929. The reversal of 2121023202877 is 7782023201212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2120666975001 + 356227876 = 1456251^2 + 18874^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121023202877 - 2³¹ = 2118875719229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121023202817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060511601438 + 1060511601439.

It is an arithmetic number, because the mean of its divisors is an integer number (1060511601439).

Almost surely, 2^{2121023202877} is an apocalyptic number.

It is an amenable number.

2121023202877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121023202877 is an equidigital number, since it uses as much as digits as its factorization.

2121023202877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 2121023202877 in words is "two trillion, one hundred twenty-one billion, twenty-three million, two hundred two thousand, eight hundred seventy-seven".