1121463601721 has 2 divisors, whose sum is σ = 1121463601722. Its totient is φ = 1121463601720.

The previous prime is 1121463601589. The next prime is 1121463601723. The reversal of 1121463601721 is 1271063641211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1096376526400 + 25087075321 = 1047080^2 + 158389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121463601721 is a prime.

It is a Sophie Germain prime.

Together with 1121463601723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1121463601723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560731800860 + 560731800861.

It is an arithmetic number, because the mean of its divisors is an integer number (560731800861).

Almost surely, 2^{1121463601721} is an apocalyptic number.

It is an amenable number.

1121463601721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121463601721 is an equidigital number, since it uses as much as digits as its factorization.

1121463601721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 1121463601721 in words is "one trillion, one hundred twenty-one billion, four hundred sixty-three million, six hundred one thousand, seven hundred twenty-one".