1010665121 has 2 divisors, whose sum is σ = 1010665122. Its totient is φ = 1010665120.

The previous prime is 1010665087. The next prime is 1010665133. The reversal of 1010665121 is 1215660101.

1010665121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766680721 + 243984400 = 27689^2 + 15620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010665121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1010605121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505332560 + 505332561.

It is an arithmetic number, because the mean of its divisors is an integer number (505332561).

Almost surely, 2^1010665121 is an apocalyptic number.

It is an amenable number.

1010665121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010665121 is an equidigital number, since it uses as much as digits as its factorization.

1010665121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1010665121 is about 31790.9597370070. The cubic root of 1010665121 is about 1003.5424763761.

The spelling of 1010665121 in words is "one billion, ten million, six hundred sixty-five thousand, one hundred twenty-one".