2000123121977 has 2 divisors, whose sum is σ = 2000123121978. Its totient is φ = 2000123121976.

The previous prime is 2000123121929. The next prime is 2000123121991. The reversal of 2000123121977 is 7791213210002.

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., 1911073997056 + 89049124921 = 1382416^2 + 298411^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000123121977 - 2²⁶ = 2000056013113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2000123121907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000061560988 + 1000061560989.

It is an arithmetic number, because the mean of its divisors is an integer number (1000061560989).

Almost surely, 2^{2000123121977} is an apocalyptic number.

It is an amenable number.

2000123121977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000123121977 is an equidigital number, since it uses as much as digits as its factorization.

2000123121977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

Adding to 2000123121977 its reverse (7791213210002), we get a palindrome (9791336331979).

The spelling of 2000123121977 in words is "two trillion, one hundred twenty-three million, one hundred twenty-one thousand, nine hundred seventy-seven".