1121020057 has 2 divisors, whose sum is σ = 1121020058. Its totient is φ = 1121020056.

The previous prime is 1121020049. The next prime is 1121020063. The reversal of 1121020057 is 7500201211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 891679321 + 229340736 = 29861^2 + 15144^2 .

It is an emirp because it is prime and its reverse (7500201211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121020057 - 2³ = 1121020049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121020067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560510028 + 560510029.

It is an arithmetic number, because the mean of its divisors is an integer number (560510029).

Almost surely, 2^1121020057 is an apocalyptic number.

It is an amenable number.

1121020057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121020057 is an equidigital number, since it uses as much as digits as its factorization.

1121020057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 1121020057 is about 33481.6376092926. The cubic root of 1121020057 is about 1038.8140008923.

Adding to 1121020057 its reverse (7500201211), we get a palindrome (8621221268).

The spelling of 1121020057 in words is "one billion, one hundred twenty-one million, twenty thousand, fifty-seven".