2121023203177 has 2 divisors, whose sum is σ = 2121023203178. Its totient is φ = 2121023203176.

The previous prime is 2121023203099. The next prime is 2121023203207. The reversal of 2121023203177 is 7713023201212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2034457206336 + 86565996841 = 1426344^2 + 294221^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121023203177 - 2³¹ = 2118875719529 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121023201177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060511601588 + 1060511601589.

It is an arithmetic number, because the mean of its divisors is an integer number (1060511601589).

Almost surely, 2^{2121023203177} is an apocalyptic number.

It is an amenable number.

2121023203177 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121023203177 is an equidigital number, since it uses as much as digits as its factorization.

2121023203177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

Adding to 2121023203177 its reverse (7713023201212), we get a palindrome (9834046404389).

The spelling of 2121023203177 in words is "two trillion, one hundred twenty-one billion, twenty-three million, two hundred three thousand, one hundred seventy-seven".