1421120551777 has 2 divisors, whose sum is σ = 1421120551778. Its totient is φ = 1421120551776.

The previous prime is 1421120551723. The next prime is 1421120551783. The reversal of 1421120551777 is 7771550211241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1241510721361 + 179609830416 = 1114231^2 + 423804^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421120551777 - 2²³ = 1421112163169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421120551577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710560275888 + 710560275889.

It is an arithmetic number, because the mean of its divisors is an integer number (710560275889).

Almost surely, 2^{1421120551777} is an apocalyptic number.

It is an amenable number.

1421120551777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421120551777 is an equidigital number, since it uses as much as digits as its factorization.

1421120551777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137200, while the sum is 43.

The spelling of 1421120551777 in words is "one trillion, four hundred twenty-one billion, one hundred twenty million, five hundred fifty-one thousand, seven hundred seventy-seven".