1021136065 has 8 divisors (see below), whose sum is σ = 1225749888. Its totient is φ = 816651120.

The previous prime is 1021136047. The next prime is 1021136087. The reversal of 1021136065 is 5606311201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021136065 - 2¹³ = 1021127873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13831 + ... + 47260.

It is an arithmetic number, because the mean of its divisors is an integer number (153218736).

Almost surely, 2^1021136065 is an apocalyptic number.

It is an amenable number.

1021136065 is a deficient number, since it is larger than the sum of its proper divisors (204613823).

1021136065 is an equidigital number, since it uses as much as digits as its factorization.

1021136065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64439.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1021136065 is about 31955.2196831754. The cubic root of 1021136065 is about 1006.9962927362.

Adding to 1021136065 its reverse (5606311201), we get a palindrome (6627447266).

The spelling of 1021136065 in words is "one billion, twenty-one million, one hundred thirty-six thousand, sixty-five".